Dubach Racing Development (DR.D) started with the goal to produce the best exhaust systems and related MX products that actually make your bike run better, not different. DR.D has worked with the best, tested virtually every motocross bike make over the past 10 years, and still works hand in had with the Yamaha Testing division. They know the effort that must go into a product for it to perform at a level that exceeds the admittedly extremely good stock bikes and ATVs. DR.D puts 100% effort into their products and constantly strives to achieve your business.
- The Quiet Core Insert is designed to be used with DR.D NS-4 exhausts.
- The insert can be installed and removed very quickly.
- As the name suggests, it significantly reduces the sound level.
- Sold individually.
