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BOYESEN 2002 RM250 BOYESEN RAD VALVE RAD-24I Flat Bill Snapback Cap Harley Davidson XL 1200X FortyBoyesen Rad Valve RAD 24I RAD24I 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