I have roughly the same mods that you mention. Stripped interior, Airbox, cat back and RS Barn chip. My car runs very strong. I even had $112 of 98 octane in the tank that day. E46's consistently walked away from me anywhere there was a straight.
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I guess it depends on what year it is ? I know that with just the chip , air box mod, catback and around 75 lbs off stock weight, in my six speed 968, I was able to consistently edge ahead of E 46 M3s, on freeway runs ( not 0-60 ) . The E 36 M3s weren't even a sweat, lol. So I wonder if the E 46 had a few generations where they continued to increase the power from one year to the next ..
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