Originally Posted by Jordo!

BTW, that other dyno above showed a gain of about 3.5% for the exhaust and 2.5% for the intake -- this is also in line with what I would expect from a catback (with OEM cats) and an intake (panel fitler or otherwise).

Again, raw values are far more misleading that proportionate gains -- there you should see a lot less variance from vehicle to vehicle, and dyno to dyno for a given bolt-on.