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BOYESEN RAD VALVE 01-02 YZ125, BLOCK RAD-33G YAMAHA MX, RAD33G Moto 7.5 Gas Gas - EC300 RACINGBoyesen Rad Valve RAD 33G RAD33G 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