Alright i have a ZZP mid length combo sitting in my room right now begging to be put on. Its 1 3/4 prim. with 3" catted DP. Im running Corsa sport right now and i know its gonna be loud. My question is i have a magnaflow round 3 inch muffler sitting in my attic right now. If i were to weld that in to the cat back were the resonator is (or lack there of on corsa sport) will it kill the sound down or not. Im assuming it will but i wanted to see if anyones has done this yet. Also is it gonna kill my HP numbers? I was gonna do that or get a ZZP wisper. Let me know what you guys think.

 

Anyone?

 

Just put the header/DP on and try it. If it's too loud for your taste, add a resonator.