Our stock SuperJet went 44.6 mph at 6,200 rpm. After installing only a Factory Pipe with the recommended jetting, the same boat went 48.3 mph at 6,700 rpm. A gain of 500 rpm and 3.7 mph by changing only the pipe! The Factory Pipe 701 SuperJet comes complete with our exclusive tunable headpipe, aluminum chamber, tuned exhaust manifold, and all required hardware.