I currently am running a Buschur SCAA 3" exhaust it has the Buschur Bullit exhaust with no Catalytic, it sounds HELLA loud and am looking to quiet the exhaust down some.

Today i threw on a Magnaflow resonator hoping to tame the noise a little bit, but come to find out after the install that it did ABSOLUTELY nothing lol.

I am really debating now going with a 300 cell High flow catalytic but am wondering if i would get power loss and if so how much? Estimated? I have seen people compare test pipes to regular High Flow cats but not 300 cell high flow cats so i'd like to know if someone else has compared or has an experience with a 300 cell

 

Why not try mil-spec 100 cell race cat ? There was a test that showed a small amount of hp loss on the top end.