Re: Exhaust Recommendation for 5.4 V-8
I've been jonesing for an aftermarket exhaust myself. As I understand it, however, if you free up the exhaust you lower back pressure and might get a little more H.P But you will loose Torque by lowering the backpressure. You want higher torque not higher H.P. on a truck. Another thing is that any H.P. gains made by messing with exhaust are made in the higher RPM range. On a truck you want your power on the lower end of the operating range.
Torque is how much work you can do and H.P. is how fast you can do that work. A tractor trailer moves 80,000# with only 450 H.P. but 1600# torque multiplied through gearing.
Personaly, I just want more noise. Which Flowmaster?
"there is neither science nor fact prevailing here" - vlamgat