Ok so heres the deal, I want a custom exhaust. Ima do it me self so what I need to know is as follows:

Stock tubing diameter?
Suggested tubing size
Can I get a better flowing cat?
Suggested cat
suggested silencer


so it goes like this engine->header-> e2 sensor-> whatever tubing -> whatever cat-> tubing->silencer? is that prety much it? or am I forgetting something?

Thanks

the resinator?

Stock tubing diameter?- 2" from down pipe to resinator and then 1.5" back to exhaust tip
Suggested tubing size- Depends on your future applications if your gonna stay N/A( Naturaly Aspirated) then 2"-2.25"... if your going to turbo it then wait until you turbo it to get 2.5"
Can I get a better flowing cat?- Yes, Magana Flow makes a high flow cat
Suggested cat- Magna Flow high flow cat
suggested silencer - ???

But a good person to contact about getting the high flow cat and resinator questions is Stylis (Gabe) on here... He owns Precision Muffler in Cali and knows his $hit and does awsome work.

Thanks Billy, By the way i met Kenny from ZPI when he was over here for an event! :D Great guy.