True story! If you are a 6.4 owner with a stock exhaust you dont really know the true performance of your truck. We have a 6.4 at the shop as one of our tow rigs and we dynoed it at 630hp with nothing but an H&S tuner and a downpipe back exhaust system.




LinkBack URL
About LinkBacks



Reply With Quote
Black Beast


6.7 Cummins

