how much power and torque would lost/gained by installing an o/r h pipe and dump with stock headers for now? Anybody running this combo? Any advice is appriciated.
I had stock headers, mac o/r H-pipe, flowmaster 2 chambers, and dumps. It sounded like an old car. Very loud and obnoxious. I found that it did add a little power up top end and it lost a little torque on the bottom. Not a big difference in power though. I found a good sound is the Mac H-pipe w/cats, flowmaster 3 chamber cat back with 2 1/2 tailpipes, and Motorsport shorty headers. This will give a good sound but bearable. This will also keep it smog legal if you need it to.