What is the difference in h pipes, brand to brand? Pypes, Pacesetter, JBA, Summit Racing, etc.? What affect do the different brands have on sound? I know the difference between a shorty and a regular (LTs vs shorty/stock headers), but I'm confused as to if there is any difference from brand to brand... I am looking for the deepest tone, already have Mac axle back. I know I want off road, just unsure which brand would be best.