We have a HUGE Stock of GENUINE HONDA OEM Parts. We specialize in late model CRF MOTOCROSS Parts.We can supply you with ALL your stock Honda parts needs. If possible use OEM part numbers from the Honda web site or your local dealer. We will contact you with OUR DISCOUNT PRICE and availability. GENUINE Honda OEM Intake and Exhaust VALVES for CRF450R Motorcycles. This sale is for ALL FOUR VALVES for the listed models ONLY. Part numbers are 14721-MEB-670 (Exhaust) and 14711-MEB-670 (Inlet). Direct fitment for the following.