Boyesen Power Reed Dualstage Yamaha Yz250 97-98 Air Filter Accessories 350F FREE-RIDE 14-20

350F FREE-RIDE 14-20

Gas Gas EC FSR 450 07-16 rear

Optimal AirLine back ventilation

Reduced Material Volume - The design also reduces the Tech 10’s profile and physical size

Boyesen Power Reed Dualstage Yamaha Yz250 97-98 Air Filter Accessories 350F FREE-RIDE 14-20One reed petal is NOT enough! Boyesen's revolutionary dual stage reed design delivers more usable power than stock. Stock single stage reeds operate most effectively within a relatively narrow RPM range and are limited because of the single stage design. Boyesen's one soft reed on top of one firm flow through reed gives you a wide range of intake control, plus increased intake velocity. Your original reeds can't possibly duplicate that performance.