why cat-back??
#4
Besides being stainless steel, the intermediate pipe is 3" mandrel bent vs 2 3/4" pressure bent , which tapers down to 2 1/2". the tailpipes are also mandrel bent. Still you may only pick up 5-6 Hp with the pipes vs 10 or so with a free flow muffler.
Originally Posted by GREATWHITE
I think the stock I pipe is 2-7/8in so yeah there will be a difference, granted not much 2-3hp but the sound will be slightly different also.