it doesnt really do anything other then looks
you have to admit it looks darn good when you see them 2 stacks bellowing out black smoke when you get on it, well if your into that sort of thing
I did it on my semi and i loved it
it doesn't really do much except for looking bad ass and better sound
Unless you're throwing a larger diameter pipe up there, then they can start to affect performance. I think 4" is the biggest I would ever think of going wwith an oil burner. But then again, HUGE bore pipes start looking way to big for a truck after that. _________________ 1990 F-150 XLT Lariat 300ci BIG SIX, EFI - Duel-out Flowmasters - 2WD
WORK TO BE DONE: 4WD + 33x12.50x15's + 9" Diff. + 3.73:1 diff. gears + Detroit Esay Locker + 4" Suspension Lift + K&N Filter/PVC Pipe + Headers/X-Pipe/True Duals/Dual Flowmaster 44's + New bed, gate, hood and other goodies to come
