DescriptionThe new 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. Preliminary testing has shown that it offers increased horsepower and torque throughout the power curve, especially in the bottom to mid RPM range.
Full System includes RS-4D muffler, titanium header and tail-pipe, installation hardware, and detailed step-by-step instructions. Titanium systems come with AMA sound insert installeds in the muffler.