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Yoshimura - Pro Series RS-4D Exhaust System (Yamaha)

The RS-4D builds on the technology that has made the RS-4 a force to be reckoned with on the racetrack, enhancing it's rock solid performance. By increasing the amount of open area at the exhaust outlet, the RS-4D increases airflow, resulting in smoother power delivery and increased throttle control. Testing and Race results have shown that it offers increased horsepower and torque throughout the power curve, especially in the bottom to mid RPM range.

Ultra lightweight carbon fiber end-cap cover
Unique Dual Outlet design
Increased torque and horsepower throughout the power curve, with most gains in the bottom to mid RPM range
Smooth power delivery allowing easier throttle control and less clutching
Dual tip allows for more flow by increasing outlet open area when compared to single outlet designs
Dual inserts for horsepower tuning and decibel reduction

This Full System comes with a Titanium header and mid-pipe, Titaniun or Carbon Fiber muffler sleeve, installation hardware, and detailed instructions to get you moving! Titanium Full Systems come with AMA Pro Racing sound inserts installed in the muffler.