Nytromchi
Newbie
Has anyone done a dyno with MBRP against a stock exhaust. Wondering what actual hp gains if any or if the aftermarket exhaust may lose hp due to these engines needing backpressure to make power.
Are you talking about full header/muffler? MBRP will probably flow better than stock but the header uses small primaries...I'm guessing the full system would gain 6-8 hp at best. I've compared it to the Hindle header side by side....it looks stock in comparison.
