I drive a 94 LS 5-speed, im having a backpressure problem in my exhaust, i have a AEM SRam intake with hi-flow cat, and 3A Muffler fireball series 3 1/2"tip, Ive heard mounting the exhaust at an angle alows better flow through the exhaust, and heard bigger piping would also help, guess im asking what do i need to do to get rid of the backpressure sound so its nice and smooth sounding.




Also was wondering if the gsr upper intake manafold bolts onto an LS, if it does would this be like buying aftermarket upper intakes.