"Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."
-Dan Thomas, CEO and Founder
We take pride in offering no hassle returns. In the event of a return, please call, email or chat with us to receive a solution to the problem. For apparel that doesn't fit quite right, Click here to see our Fit Guaranteed Program.
We will stand behind all products we sell with regards to manufacturing defects in workmanship and material. Most products are limited to the manufacturer's warranty. However, we will do everything in our power to take care of the problem.
Yoshimura has been the official exhaust supplier to several professional racing teams for years now. All of that racing experience has helped Yoshimura in making an exhaust that compliments an already great bike. The new Yoshimura RS-4D builds on the technology that has made the RS-4 a force to be reckoned with on the racetrack, enhancing its rock solid performance. By increasing the amount of open area at the exhaust outlet, the Yoshimura RS-4D Titanium Full System increases airflow, resulting in smoother power delivery and increased throttle control. Testing has shown it offers increased horsepower and torque throughout the power curve, especially in the bottom to mid RPM range where riders need it most.
RS-4D Titanium Full System comes with a Titanium header and mid-pipe, Titanium muffler sleeve, and Carbon Fiber Dual-Outlet End cap.
Includes installation hardware and detailed instructions to get you moving!
RS-4D Titanium Full Systems come with an AMA Pro Racing sound insert installed in the muffler.