Exhaust bore size for a 550hp yb
My engine build is coming to the end and im considering what to do about my exhaust, i can either get my current 3’ system modified to fit or was wondering if it’s beneficial to go for a new 3.5’ bore system, was wondering what others have done at this level? And if realistically the difference you would notice is minimal and not worth the bother, or its worthwhile. Thanks