The pacesetter header is the best designed manifold so far. Unfortunatly you had to go to a regular muffler shop to get a press bent piece which kind of defeats the purpose of getting a header if your going to use a restrictive downpipe. We dont have conrete numbers on this because it was done with the header but we can tell you that its a night and day difference in the upper RPM Band! We came up with a direct fit downpipe that will bolt up to your pacesetter header. The DP is 2.5" and instead of using the balljoint connection which the header is designed for we went ahead and used a flex instead. The flex is superior to the balljoint design being that it gives you less stress on the manifold. The downpipe has a resonator which prevents raspy ricer sounds. We also extent the o2 boss to help prevent a cel light. We will be working on a cat version soon. THIS IS AN OFFROAD PIECE!!!! DP-CBPSRegular price: $230.00Sale price: $215.00