UTV Headquarters - Yamaha Rhino 660 DRD Performance Exhaust

The Dubach Racing Development (Dr. D) exhaust systems increase power throughout the RPM range. The unique attributes of the Dr. D's Step System allows for a more efficient intake stroke. It does this by resisting the reflective exhaust pulse during the intake/exhaust overlap. In plain language, the carefully tuned steps in the system gives a crisper throttle response from bottom to top. The key advantage of the Step System is improved low, mid and top end power. Each pipe is manufactured from 304-stainless steel and each silencer is manufactured from 6063 aluminum. Together these give a fantastic combination of light weight and crash survivability. Rejetting is not required, and the Dr. D exhaust systems meet the AMA 102dB sound level requirements.