I know this is kinda newbie-ish to ask, but here goes. Does a high-flow cat make a noticable difference in power when the only mod I will have is a comptech exhaust? Also, is it necessary? (does the comptech exhaust bolt up fine?) Thanks.

 

comptech exhaust will bolt up fine. a high flow cat will probably give you 2-3 whp at most, unless you keep modding your car more of course. then the mods will work off each other.

 

how many whp do you think the exhaust will give me?

 

comptech? 1-3 whp.

 

If your doing the whole exhaust, Including header and mufler and all inbetween you should gain near 15whp, But thats saying with out proof. Also do a cia of your choice Will compliment the exhaust power and sound wise.

 

10whp to be on the conservative side.