I have a 2000 Sunfire GT 2.4 whats the optimum size of piping from the cat back into 2 ractive MT620 Mufflers, im never getting a header, high flow cat, turbo or supercharger, i just have the rk sport warm air intake, also its gonna be mandrel bent, whats best?
2 1/4-2 1/2 is prolly the best, and what more sill suggest
2.5 for supercharger, 3 inch for turbo
Im a Xbox 360 fanboy...and damn proud of it!!
If you are never doing a header or anything else then I would leave it stock.
FU Tuning
