Item fits 2003 2004 2005 YZ250F and 2003 2004 2005 2006 WR250F models. Part# 2008 JC O/S The unique attributes of the DR.D's step system is that it 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 turned steps in the system allow for a lower net cylinder pressure, which gives a crisper throttle response from bottom to top. The key advantage of the Step System is improved low arch at low end with substantial gain in the mid and top ranges.

Every DR.D Step System Exhaust is manufactured from high-quality, 304-series stainless steel. Each step in the exhaust pipe is achieved via precision machined ring that not only adds to the performance, but gives the DR.D pipe a distinctive look. The muffler is constructed out of 6063 Aluminum to lower the overall weight of the system and provide an aggressive, but pleasant, exhaust note.

Dr.D started Dubach Racing Development with the goal to produce the best exhaust systems and related mx products that actually make your bike run better, not different. He has worked with the best, tested virtually every motocross bike make over the past 10 years, and still work hand in had with the Yamaha Testing division. Riding YZs and every other competition bike, continuing to learn and develop motorcycles and moving Dr.D forward is what they do. Throughout his career, he has been fortunate that his avocation has also been his vocation. 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. They put 100% effort into their products and constantly strive to achieve your business.

We have a large  inventory our California location and multiple drop-ship warehouses across the US to help provide you the fastest delivery times. Your item is brand new, and will come to you in the factory packaging with all supplied instructions, decals, and any other materials included from the manufacturer. Your tracking number will be emailed*, and you will be provided with a Technical Support phone number should you have any questions after your purchase. If you have other questions regarding the exhaust pipes, air filters, tuning kits, installation or additional products in our ebay store ask the experts at parts@jcmotors.com or call (800) 706-9476. When calling or e-mailing, please have your phone number and auction ID number ready.