Those of you that have used the corsa cat-back setup on your ls1's, what have you gained in hp? I am trying to find the best muffler for the most horsepower. I really want to just stick with a muffler so any input is appreciated.

 

all replacement mufflers will get you the same power gains, only slightly different sounds. the Corsa is one of the more expensive ones, and some people don't like its sound. A Magnaflow or a Hooker is good, and much less expensive.

 

theres a company that sells teh bassani tru-dual sys there not a sponsor so im not going to mention names or anything but ive heard of someone picking up 15 over their borla sys its not cheap about 950 i believe but it mounts up to your stock manifolds just something to keep in mind he does have dyno charts to prove it as well forgot to say that initially