I know a lot of people do it and I'm not sure if you plan on doing it but I just dont like the idea of mixing and matching different brand headers with different brand silencers. Because the companies build the headers to flow correctly with the silencer and they dont put all that r&d into for fun, I would'nt imagine making that great of hp when mixing headers/silencers but thats just my opinion and I'm sure someone will disagree. mclarenkid you dont plan on buying an aftermarket header and keeping the stock silencer do ya?