BOYESEN 97-98 YZ250 BOY.RAD.VALVE RAD-34D Header Fused-dual-layer design air filters offer

Fused-dual-layer design air filters offer combined performance and protection

450 SX-F 15-23

415 Chain is best suited for bikes up to 50cc

who tested the product on various surfaces

BOYESEN 97-98 YZ250 BOY.RAD.VALVE RAD-34D Header Fused-dual-layer design air filters offerBoyesen Rad Valve RAD 34D RAD34D Now delivered with carbon fiber reeds for even greater performance gains Maintains flow velocity through the valve and redirects intake charge for more even distribution to the intake ports Sharper, quicker throttle response Added torque improves performance on hills, through corners and over technical jumps Increases horsepower in low , middle and especially the top end ranges One piece aluminum casting, no trimming