BOYESEN 1999 YZ250 BOY.RAD VALVE RAD-34E Muffler End Cap 400/620/625/640 LC-4 97-10

400/620/625/640 LC-4 97-10

Compatible with stock auto-decompression and valve springs

2021 - 2026 GAS GAS MC 85 17/14

Sportsman 570 EPS Quad 16

The striking logos of Carl Cox Motorsport

BOYESEN 1999 YZ250 BOY.RAD VALVE RAD-34E Muffler End Cap 400/620/625/640 LC-4 97-10Boyesen Rad Valve RAD 34E RAD34E 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