I have a 1996 camaro rs (v6). i love the car and i dont in any intend to put in a v8 or trade it for a z28. i would have to swap the pcm for a 1997 model to do it, but what is a rough estimate of the mpg and hp gains that a tuner like HPTuner or something might give? the car is basically stick, with a magnaflow muffler/dual tips (it is just the muffler, sadly. not anything else exhaust is modded.) and a k&n filter. oh, and if you think the muffler might sound bad like v6's are supposed to... it doesnt. it sounds almost like a quiet v8, and i know what a v8 sounds like haha. my dad has a 73( i think) chevy cheyenne 20 with a 454 that had been cammed with intake and exhaust done. lets just say i would know rice when i hear it haha.