For 09-14 Yamaha R1

• Color: Silver
• Finish: Polished
• Mounting Style: Slip-On
• Muffler Quantity: 2
• Muffler Style: Standard undertail dual polished mufflers
• Type: Muffler Assembly

The easiest way to gain real performance on your bike is by installing a good aftermarket exhaust. At M4 they take the time to make sure the performance gains you are getting are the very best possible. They won't feed you unrealistic or impossible numbers. You will get a real performance exhaust system with real horsepower and torque increases all through the RPM range. The result of this unwavering dedication to manufacturing top quality exhaust systems has resulted in systems that equal or outperform any other pipe on the market today. Full systems typically result in a 6%-8% increase in horsepower and weigh just 11-12 pounds. Slip-ons provide a 2-3 horsepower increase and weight 5-8 pounds. Add to that the variety of finishes and incredible styling that M4 offers, and the result is an exhaust that is second to none.