I know the subject of exhaust has been pretty beaten to death on here. But after searching I cannot find an exact answer to my question. I'm ready for a cat back on my s4, but I'm not sure which one to get, the vids online are so crappy. I've heard the twin1 and twin2 systems in person, and I guess I'd like something inbetween them for loudness. Is ASP louder than the twin 1? Milltek as quiet as the twin 2? It would be nice to establish an offical Audi Forums list of exhaust, their loudness, and a few details of each to help people out.

 

well i have an asp tru dual and i gotta say its great, i feel the boost in power and it is not ridiculously loud but it sounds like pure sex and its not hard to sintall at all but ur tech certified so i dont have to tell u lol never seen a miltek in person to compare it with mine but i love it its not to loud but its just right, it sorta gets quiter as the turboes spool faster and then all u hear is turboes but still its great imho