Yamaha ABA-0SS56-21-03 Stainless Steel/Carbon Fiber Graves Motorsports Cat Eliminator Exhaust System FZ1 Fits Model Year 2006-2011 FZ1 Hand-made-in-the-USA slip-on exhaust system for the Yamaha FZ1. Huge gains in horsepower (+6hp) and torque (+5ft./lbs.) are achieved while eliminating 11 lbs. of dead weight all while retaining the center stand! This high performance exhaust system features stainless steel tubing and a carbon fiber silencer with our new tapered titanium conical end cap. System gives an overall weight savings of 11 lbs. compared to stock exhaust system.