if you get l/t's then changing the midpipe takes like 15 minutes because of how easy it is to access....ive heard of people changin them before and after emissions

 

then youve got to buy both. and the tuner doenst fix the emissions problem it just clears the check engine code commin from the o2 sensors. youll still be screwed on emissions if you have o/r on.

 

Oh, jj, mid pipes, have little to no affect on hp with V6s. Once the y pipe is gone, all the hp gains are the same. A v6 is not like a V8. V6s are even fire, so the mid pipe will not effect air flow, hp wise, like they will a V8 which fires very unevenly.

 

amrcnidyot: you say if I get high flow cats or catless h pipe config, it makes a big difference? So if I don't have them, or have them removed since I don't know if I have them or not, it would make a big difference with my flowmaster hpipe config? We don't have emission tests here in Florida anymore so I guess it doesn't make a difference. How does it normally run to have the cat removed?