SFR has 3" 304SS downpipes that are critical in removing exhaust from the hotside of the turbocharger. These pieces of art are made out of 304 stainless steel. They are TIG welded and feature v-band clamps. They are built on jigs to insure a perfect fit.Once you get the exhaust out of the turbos, you need to get it out to the back of the car. You can accomplish this two ways. Your first option is the dual 3" SFR testpipes. These are two 3" 304SS testpipes that mate up to our 3" downpipes. They feature a crossover tube to equalize the flow of exhaust gases. The next option you have is two 3" 304SS pipes that merge into one 4" 304SS testpipe.Now you need a muffler, or two! Not a problem. We have a single 4" HKS Carbon/Titanium unit that exits in the stock location. For those that want more exhaust flow, we have dual 3" Titanium HKS units attached to 304SS mandrel bent piping that