We always considered the factory exhaust system fitted to Mopar musclecars as good. As factory systems of the era go, the OE Mopar exhaust was generally the best. Mopar iron manifolds were typically ...

We've all heard the talk. It seems to run the gamut from, "Dude-headers are worth 100 hp," to the naysayers who snivel "Headers? They aren't worth the trouble." The truth is actually somewhere in the ...

Just how much power can Supersprint exhaust headers add to an S54-powered BMW Z3M Coupe? In this video, we install a full header system and head straight to the dyno to find out. 🎧 Plus: hear that ...