i cant decide between slp 2otl or mangaflow i have heard sound clips of both (like them both) but i cant find hp/tq gains on either one. im looking for the most power i can get.

if anyone has dyno numbers on these catbacks on a stock m6 ls1 or a link for me to look them up that would be great.

thanks
jim

 

I dont think any catbacks are really going to provide much power. If thats what your looking for get a cutout and a set of headers. Dont think there will be much difference in power between the two.

 

well if your looking for raw sound go with slp of course,,for a more tuned sound magnaflow is the way to go,,,,hp gains between the 2 will be minimal in my opinion

 

i do plan on LT headers and 3" ypipe later down the road. which catback flows better?

 

Anything besides Flowmaster. Some are a straight shot through, like Loudmouth, but unless you are pushing high HP numbers, the catback won't hurt you that much. Just buy the one that sounds the best to you.