rb header and / 1 or 2 mufflers?
#15
I think I'm about to ditch the cats for the test pipe...does it matter what diameter for this?
And why is out the side so much better? I mean, not "because you go faster," or "because it sounds cool," but the mechanics of it. Is it shorter distance?
And why is out the side so much better? I mean, not "because you go faster," or "because it sounds cool," but the mechanics of it. Is it shorter distance?