From my first test drive after installing the RSB Stage 1 chip and Air Box mod. I already had the cat-back and I have to say that I am very happy with the improvement. Everybody says this, so I had to throw in as well. I also installed the Works Bell flappy paddles and that transforms the tip and makes it much more fun to drive. The switches and mechanism in the console have seen better days and don't have the tolerances that the new microswitches in the paddles have. Shifting is faster, especially downshifts.
-kb