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LS1 968

this is certainly developing - cool - this is fun - here's a few more things to think about:



i think the entire concept of such a project is being missed - for somebody to contemplate such a thing, it is because they want to drive faster than they can with the stock motor - to drive faster means to drive harder, rev higher, and subject the engine to a lot more stress - this means higher tolerances, more service interval, and less life expectancy - scrimping on such a thing is illogical and a direct conradiction in concept



as for cost, since headers and exhaust alone are good for an easy 2.5k, and the bellhousing is another 4-500 minimum, i see this adding up in a hurry - 6k is an easy figure to get to - i've now dropped well over 30k on mods, and i haven't even gotten to the engine yet



on the motor mounts, i disagree - the dampening needs require a soft mount, not just a strong one - there are only 2 mount points up front, and not 4, like in a chevy - the rear cross member is not there this means a different kind of mount than those inexpensive chevy things - all vibration dampening is done with only the 2 mounts - if you think those hard rubber mounts will do the job, try sticking some in the car and driving it - you will quickly rattle your teeth loose - i am going through this dilemma right now, in contemplating aftermarket mounts to lower the motor - i am looking at over $300 for mounts that can do the job on this motor - i could expect nearly twice that to handle the torque and vibration of a V8



on the wiring, i think you are overlooking the engine management system, and all of its wiring, along with the interface to the instrument panel - getting that right is goof for a grand - the fact that they are selling it at $450 frankly amazes me - i could see easily spending a day figuring that out - that's a grand in my book



there are a lot of costs that seem to be forgotten when contemplating such a a project - i just spent over $200 just moving my battery to the trunk, and that was parts only - good parts are expensive, but they work - cheap parts don't - i would guess you would have to spend about $300 in wire and connectors alone, without even factoring in the cost of the time involved - my time is not free, and if i can get somebody else to do something cheaper than for me to do it, it's a good deal - such would easily be the case of a $450 wiring harness - having spent way too many hours reparing hack job harnesses, a good harness is an absolute must



by the way, what are they charging for the computer to control that thing?



and as for the used motor, would you put one in one of your planes? i subject my car to the same kinds of risks every time i get in it - we aren't talking about a commuter car here - who would think about this kind fo power if they weren't going to use it? by definition, that means high revving, hard pushing, heavy stress use - this is not something that is wise to subject a used motor to - i plan to rebuild my motor every 80k - that is as long as i expect an engine to last and still run right, given this kind of use - at 90% compression, it's done - why would i cut that life expectancy in at least half? at a bare minimum, i would take the used motor and rebuild it



6k seems cheap to me IF it's complete - but, my issue is not, and has never been with the cost - at 20k, if it worked well, i think it is well worth it, and i would quickly open my checkbook, and drop off my car - after all, i budgeted 60k originally, and have recently bumped that up to 75k, to get this car up to the level of performance i want - i wanted something to stand up to the supercars, and that costs money - you know the old saying "if you can't run with the big dogs, stay on the porch"



there is another one "no good sports car is cheap, and no cheap sports car is good"



my issue though is with the feasibility of the concept - i don't think the car can withstand the torque driven hard for very long, without a lot of modification



on top of that, i just had to increase my spring rates AGAIN to handle the extra power i have now - i was squatting too much and losing hookup - this means more money on such a conversion than i have already spent just to handle what i have now



then, there's brake upgrades to haul the thing down from the speeds it will be capable of



but, if you can get a V8 in the car for under 6k out the door, and not lose any of the features and reliability, i think you could stand to make a bit of money



lol - but, maybe that was the point you were trying to make all along - it can't be done, and therefore isn't worth it



ah - choices
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
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Well Flash, I can see that there is an extreme difference in viewpoint here even though we really are on a similar wavelength! Ha



If indeed you plan to race the 968 and push it to its limits and are willing to budget $75K in doing so (are you out of your mind? Hee), then yes I can see where $15-20k is no big deal to you for an LS1 conversion. For the rest of us though, $15K is an extremely high price to pay for such an upgrade (or at least for me it is) considering that most of us own a fairly low cost older 968 instead of a newer high doller $90K Porsche because of the costs (that and the fact that the 968 Cab is so beautiful!!). Alot of us would be willing to upgrade our older high mileage 968's with a low cost solution if it offered greater power for less cost in the process vs rebuilding the expensive stock 968 Porsche engine. Of course if it costs $15-20K to do such a swap then it's not economically feasable and thus rebuilding the 968's 3L engine would make more sense! On the otherhand if the LS1 is just TOO much power & torque for the 968 such that it breaks parts then it may not be a good choice to go with anyway.



The $6K cost of the Renegate kit doesn't include the entire exhaust system, it only includes exhaust headers. In most street driven only cars headers are generally just a complete "pain in the ass" with constant leaks and causing the engine well to run extremely hot. If I were to do such an LS1 swap I would just use the stock F-body double wall tubular exhaust manifolds if they fit or modify them slightly to get them to fit. That would save $950 off of Renegades optional items right off the bat, and since the LS1 is already making 100 hp more then the stock 968 engine anyway I don't see where headers are really worthwhile (unless you are racing such as yourself!).



Since a V8 is already a much smoother running engine than a 4 cyl engine (even in comparison to the 968's stock engine with balance shafts), the mounts don't need to dampen out that much vibration. I don't really see why the stock Corvette rubber mounts couldn't be used with custom adapter brackets. If you are so concerned with that then use the mounts that Cadillac uses on their V8 installations (surely they strive for smooth running installations in their luxury cars?).



As far as all of the wiring, I am NOT overlooking all of the engine management and other functions that interface with the instrument panel. For the coolant temp gauge and oil pressure gauge it is best to simply use the stock 968 sensors via adapters in the LS1 engine so that the gauges still work correctly. The tach only needs the addition of a $75 aftermarket interface module to condition the V8's signal to the 968's 4 cyl tach (a very simpe installation). The stock LS1 F-body engine harness is used with a stock F-body ECU (which you get when you buy a complete engine pullout from a wrecked vehicle as I recommend) and only the additional things like power & ground, O2 sensors, etc needs to be brought in to the stand alone manual tranny ECU (you do have to either wire out the theft prevention system with a matching BCM and steering column resister, or have that programed out of the ECU). There are a few other functions I haven't touched on, but they are all minor to accomplish. By the way, that $450 wiring harness is not just a plug and play harness. It most likely has alot of separate unterminated wiring that requires custom splicing & taping into the 968's stock body harness (that is generally the way that they come), so it isn't all that simple to use. That is why I like to use a stock factory GM harness on any swap, because it simplifies the whole installation to just go ahead and make a custom interconnecting harness that interfaces with both the GM engine harness connectors and the swap vehicles body connectors (no wiring needs to be cut & spliced in either harness).



Yes, I would mount a used aircraft engine in my plane, and in fact did just that (it was a 180 hp 0-360 Lycoming from a Cessna Cardinal that had 1200 hrs on it SMOH. All that has to be done is run a differential compression test on it to see how worn out the rings are, as well as a careful inspection. At $30K cost for a new engine vs the $8k cost I got it for it was a bargain! So are the used V8's from wrecked vehicles, since you get all the ancillary equipment with it for no extra cost!!!



In all reality, we should be able to swap such an engine into our 968's for no more than about $6-7K total (this is with all labor being done by the owner), but if the conversion kit costs are so high such as Renegade has them priced then it just isn't worth it unless you really want to race the 968 and cost is of no concern!!!
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lol - perhaps



again, this is not in defense of renegade, or the concept



the fact that the car was inexpensive to purchase is EXACTLY what made it a perfect candidate for my project - at the time, i was shopping for a 2 seat front engine rear wheel drive ragtop for 60k (that was not a vette - i can't wear belt buckles that big) - even after the budget bump, for the 75k i will have spent, no other car for the money will touch it - best bang for the buck going - pure economics



this makes it the perfect cadidate for a V8 engine swap too - it also makes it a perfect candidate for turbocharging or supercharging - if you want to run at the level of a supercar, you have to spend money - unfortunately, there is no free lunch



i've never had headers leak - what seems to be the problem? also, every engine bay i've ever had them in was actually cooler, including this one, by about 20 degrees - not sure what the deal is there - maybe you have been using thin wall headers - again, no substitute for good parts - i would have to look at the engine characteristics to determine whether or not headers are necessary - 7k plus operation is a MUST, due to the gearing, and if the stock manifolds don't flow there, then headers have to go in



a small block chevy is one of the danciest motors i've ever come across - even my 6.0 in the denali is a mess - the kinetic energy of each pulse would be very large by comparison to the 968 engine, and requires soft mounts - i don't know anything about the cadillac mounts, but if they are only using 2, it might work - if however, as i suspect, they are actually using 4, because they have a transmission crossmember, which we lack, then i doubt they would be up to the task - that is the part where this falls down - we have a total of 3 attachment points to the car for the entire drivetrain - chevys, and most cars for that matter, have twice that - half the points means twice the load, and twice the need for dampening



in dealing with the wiring harness, i would insist that the computer be placed in the factory location, and the harness be transparent, with full wrapping and sleeving, just like factory - the last thing i want to see is a bunch of loose wires around the engine - that would be a lot of work, and one i would gladly pay a grand for



wow - remind me not to fly in your plane - i have a dead friend who did exactly that, thinking he was saving money, but there turned out to be a failure due to the previous owner overheating the engine, that did not show up in visual inspection, that would have in a rebuld - his children wish he had spent the money and done it right



we're going to differ on this for sure - i wax my engine bay - everything must be perfect - no way am i going to go halfway, especially if i'm diving into a project like this - that engine is going to sparkle before going in, and i am going to make sure it's up to the duty to which it will be subjected, which would likely include some modification



i can see the logic in purchasing a used engine, so as to gain the extra components, but not rebuilding it before install, regardless of mileage, is just plain foolish to me - in for a penny in for a pound



choose used parts and do things halfway if you want to, but in my book that is no way to build a car - i've seen a bunch of such project cars, and the ones where they shortcut, always look bad and don't run long



you get what you pay for



so, no, this is probably not a good economical choice for most people - most people cannot afford, or don't want to spend 50k on a sports car, which is the minimum bottom line, if you want a 968 with something around 400hp that runs - a stock 968 is a decent car to play with, but certainly not fast - fast costs money



no worries - to each his own
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
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I have an LS1 951 that I've been driving for a year with the 6 speed transaxle and it has been very reliable. I have broken NOTHING. The only thing I've done to the transaxle is fill it with royal purple and use it. Like 968ls1, my car was 68 lbs lighter in the front since I removed my front headlights. I'm trying to work with a couple of other V8 owners to get powerhaus 2 to make a taller final drive to get 75mph at or below 2.5K rpms. That will definitely round out the package of the drivetrain. I'm fine tuning the brake pad and pedal ratio to get the best combination for the brake system. My conversion was done by German Performance (they are doing two 968's right now) they don't use any renegade hybrid parts, all custom made.



I would recommend this anyone that wants more performance. with the TEA heads and the lunati voodoo cam I have about 420 hp to the rear wheels. Maybe then, Ill go to the GKN axles



Jpr
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Guys,



Sorry that I have been out of the loop so I have not been able to reply to any of the recent posts. I don't want to sound like I know it all about the 944/968 conversions, but I have done several of these conversions both LT1 and LS1 Thought the process I and have learned a lot about the facts of what works and what doesn't. First to address the Vortec vs LS1 . Here is a factual example:

My old 944 turbo LT4 car had a set of fully ported LT4 heads and intake and a 220/230 114cl comp cam. That engine made 360RWHP and 350RWTQ the engine had a noticable lope and the engine pulled good up to 6300rpm. My current LS1 with ported LS6 heads a comp 220/222 116CL makes 390rwhp 375rwtq will pull to 7K and idles smooth as a stock vette. The engine has no paper or cork gaskets( the LS1 has O ring reusable gaskets) The ls1 has distributorless ignition, individual coil packs and is internally balanced. My point is you can make a Vortec make similar power but will not be nearly as smooth or efficient as the LS1, not to mention the weight difference. to a . As far as the cost of the Renegade kit goes, if you are not a fabricator/mechanic and don't have much knowledge of engine conversions then the cost is justified. You don't have to have every option they show to have a good conversion. The time it takes to figure out what will work and won't is what you are paying for I know because I have done it several times. All this talk about mounts is BS I have done it and the energy suspension chevy mount work great won't fail and do a good job of isolating the engine from the car. Flash, chevys uses 2 engine mounts and 1 tranny mount, just like the 968, I can speak from experience and they work fine. The 944/968 chassis can hande the power, I have owned a V8 powed 944 and 968 for 8 years and have NEVER broken anything from the added HP and TQ. I have done dozens of DE's and never hurt the gearbox or chassis. If you twisted a 944 chassis as you say then you were probably abusing the car. The wiring is simple and all of mine runs through the factory porsche engine wiring harness boot on the firewall; the ecu runs the engine and intrumentation interface is done through the factory 14 pin connector in the engine compartment, just like the 944/968's were from the factory. Flash until you have done one of these conversions you are simply making false persumptions about how well they work. Based on most of your posts a V8 conversion is not for you and that is great! All I can say is from my experience the LS1 conversions work great are reliable. Any conversion is olny as good as the builder that does it and the quality of the parts that are used. Mike Gokey and I are friends and he does excellent conversions, I would highly reccomend him to anyone who wanted one built. I hope this puts alot of these speculations to rest. I closing I am working on a power brake solution for the conversions, I will post more info when I finish track testing. (JRP call me on this and I will give you the preliminary scoop).
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i think you have me wrong here - i'm not saying that it can't be done at all - just that it can't be done right cheaply



chevys may use 2 motor mounts, and one tranny mount, but then they also have a connection at the rear, and no torque tube to connect things - that means a lot more load on our mounts, with fewer mounts to handle it - i don't know the mounts you are talking about, or how much they isolate things - i only said that beefier mounts than ours, and ones that were good at damping, were needed



stock this car is lumpish and vibrates - it is by no means smooth - many complain about it - if you have worked out something that is at least as smooth, great



abusing - hmmm - we dumped the clutch and twisted the car - never got to get out of the parking lot - total distance was about 50 feet - i told the client it was the wrong chassis to build a 1/4 mile car out of, but he insisted - he cut the car up into little pieces the next week, and stuck the motor in a mustang



i see potential pitfalls, and have always said, i want to see one and drive it - i know the things that break already, given only the factory power, and i know the things that have shown to be inadequte given the power i now have - more power will only show more things that need to be beefed up



i'm sure a conversion can work - i just felt that the 6k cost of a good kit was quite justified, given the number of things needed to be done to do it right
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
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Hey ls1 I'm converting a 944 with a zz4 and a edelbrock pro flow system. Ya I know i'm going to have to do hood mod but i built the engine before i got the car,I'm curius if you used the rh bell hausing adapter or something else.
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93 midnight blue cab

03 kawasaki zx6rr

03 k2500 duramax

83 944

66 volkswagon squareback
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Doster,



The first LT1 conversion I did I used an 88 corvette bell housing /slave cylinder and fabricated a plate to connect the TT to the bellhousing. The Renegade bellhousing that is much thicker and the geometry on slave cylinder is greatly improved. I would boot up and buy the Renegade piece.
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THANKS I thaught i might be able to do it another way but it sounded like an easy way out. i'll callum ! Thanks <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />
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93 midnight blue cab

03 kawasaki zx6rr

03 k2500 duramax

83 944

66 volkswagon squareback
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Well, i am definately a noob at this forum, in fact this is my first post,



When i turned 17 my sister needed a car so she got our old geo prizm and i got a 944 S ... that needed 5k worht of work to get running. I have never enjoyed a car as much as that one, now i am currently driving a mazda 3 and i cant wait to get back into porsche again.



enough background...



this looks like the coolest thing anyone could do to this car...

about the hood clearances... i myself would make the hood into a shaker if it had problems clearing... comon... see teh motor SHAKE!>.. <img src="/forum/images/smilies/968/cool.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/cool.gif" class="smilie" alt="" />



968 ls1 how did you route the exhaust... i remember in my 944S that there wasnt much space for a true dual system.



when i graduate from clemson (mechanical engineering thanks to the wonderful time i had working on my 944 and my dads '83 911). I will probably be searching out a 968 and if the motor blows... god help it...
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STraight Four welcome to the forums <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />
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Sean - San Francisco

'92 coupe, white / tan, clutch LSD, early production car (#56)
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Straight Four,



I run a single 3.5" with 2 satinless mufflers in the tunnell and a magnaflow in the rear; I wanted the car to be quiet. I considered duals but the single made more sense given the room, not to mention duals would weigh a good bit more.





[quote name='Straight Four' date='Jul 26 2006, 10:57 AM']Well, i am definately a noob at this forum, in fact this is my first post,



When i turned 17 my sister needed a car so she got our old geo prizm and i got a 944 S ... that needed 5k worht of work to get running.  I have never enjoyed a car as much as that one, now i am currently driving a mazda 3 and i cant wait to get back into porsche again. 



enough background...



this looks like the coolest thing anyone could do to this car...

about the hood clearances... i myself would make the hood into a shaker if it had problems clearing... comon... see teh motor SHAKE!>..  <img src="/forum/images/smilies/968/cool.gif" class="smilie" alt="" />  <img src="/forum/images/smilies/968/cool.gif" class="smilie" alt="" />



968 ls1  how did you route the exhaust... i remember in my 944S that there wasnt much space for a true dual system.



when i graduate from clemson (mechanical engineering thanks to the wonderful time i had working on my 944 and my dads '83 911).  I will probably be searching out a 968 and if the motor blows... god help it...

[right][post="24616"]<{POST_SNAPBACK}>[/post][/right][/quote]
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jpr, I have seen your car at Mike Gokey's shop, he will be converting my 968 this year sometime. I rode in one of his employees 944 ls1, that was all I needed. Bad ass!!
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968 LS1......I woild like to contact you about my LS2 conversion into my newly bought 1995 tip 968. I plan on selling the motor and trans and dealing with any wiring issues from the tip delete. I will be running a 951 LSD trans initially. I have a donor 944 for clutch pedal,etc

I currently am in the middle of an LT1 383 stroker using the Renegade parts. I bought the 944 lt1 roller as an unfinishished project off of ebay this past summer. Unfortunaltely when the car arrived it came with a rod knock . Once dissasembled one thing led to another and i'm building it with and eagle 383 rotating assembly,Keith Black forged pistons and new trick Flow heads i will be getting next week. This is just an interim car as i desire to do the LS2 conversion after i drove Tony Garcias car here in california. I have to agree with 968LS1 . That car with cam and headers put out around 450HP and Tony has the car stripped to 2650LBS. Car is bad to da bone and idles like a stocker. LS2 engines and conversion parts do cost bucks. You have to pay to play. Just try to do all that you can do. Option 2 is to go out and buy a new ZO6, but you know what that cost!

Is there any difference in the lenght of the 944turbo vs. the 968 6 speed T tube? What about my automatic setup? Is the TT the same?

Great Forum..............Thanks in advance..........Geno <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />
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I hope one of these LS conversions makes it to Hershey next April for the 968 gathering.
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'95 968 Cabriolet White/Chestnut Brown

'94 968 Cabriolet Midnight Blue/Gray
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Geno,



You will need a 944 torque tube to do your 968 ls1 conversion, the 968 TT will not work. I am not sure about the 968 automatic TT but I would suspect it will not work. I will PM my contact info.



Regards,



Tom







[quote name='sker66' post='29509' date='Dec 30 2006, 11:33 PM']968 LS1......I woild like to contact you about my LS2 conversion into my newly bought 1995 tip 968. I plan on selling the motor and trans and dealing with any wiring issues from the tip delete. I will be running a 951 LSD trans initially. I have a donor 944 for clutch pedal,etc

I currently am in the middle of an LT1 383 stroker using the Renegade parts. I bought the 944 lt1 roller as an unfinishished project off of ebay this past summer. Unfortunaltely when the car arrived it came with a rod knock . Once dissasembled one thing led to another and i'm building it with and eagle 383 rotating assembly,Keith Black forged pistons and new trick Flow heads i will be getting next week. This is just an interim car as i desire to do the LS2 conversion after i drove Tony Garcias car here in california. I have to agree with 968LS1 . That car with cam and headers put out around 450HP and Tony has the car stripped to 2650LBS. Car is bad to da bone and idles like a stocker. LS2 engines and conversion parts do cost bucks. You have to pay to play. Just try to do all that you can do. Option 2 is to go out and buy a new ZO6, but you know what that cost!

Is there any difference in the lenght of the 944turbo vs. the 968 6 speed T tube? What about my automatic setup? Is the TT the same?

Great Forum..............Thanks in advance..........Geno <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />[/quote]
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Nice to hear back from you Tom,



Are you in the mode of sharing some of your knowledge in area of sketches for motor mounts, bellhousing to TT adapter etc.??



I am an ex Boyd's , Chip Foose, Metalcrafters,etc. Fabricator/Machinist/Builder who has the tools,shop,and skills to do most my own work to make the project do-able.



I appreciate any help you would be willing to give. Can you tell me why the 968 TT will not work?



Can't i just use the 968 clutch disc center and have spec make up a workable disc?



I have a 05 LS2 sitting in a crate in my shop just beeging to jump out............Thanks for your responses to the forum. Its a big help when a bunch of enthusiasts can get togteher like this and share information. It makes the swaps more doable and fun.............G <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />



PS.....I just Purchased a clean 1995 968 Tip for 9K with 111,000 miles. I do have a 951 LSD for this project,but thought it would be fun to run the tip and see how she would hold up.
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anyone have an idea of what brand those seats are.



See pics from orig post on page 1. or just look here. http://www.968forums.com/index.php?act=Att...ost&id=1609

http://www.968forums.com/index.php?act=Att...ost&id=1608
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I love my 968 for what it is & don't hate it for what it isn't!
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Uhhhh...if you took the time to read 968LS1's posts at the beginning of this thread you would see that he says they are Cobra Misano's. <img src="/forum/images/smilies/968/wink.gif" class="smilie" alt="" />
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[quote name='KMR968Turbo' post='29569' date='Jan 2 2007, 09:45 PM']Uhhhh...if you took the time to read 968LS1's posts at the beginning of this thread you would see that he says they are Cobra Misano's. <img src="/forum/images/smilies/968/wink.gif" class="smilie" alt="" />[/quote]



Here you go guys............They take credit cards too!!



http://subesports.com/products/? cartID=2004052411112868.217.204.143&cat=Seating&brand=Cobra&prodID=671
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