BOYESEN RAD VALVE TC SX 125 17-22, BLOCK RAD-41E Polisport Alpinestars Tech 10 is the

Alpinestars Tech 10 is the benchmark motocross boot and now the performance and protection envelope has been raised even higher with the creation of the Tech 10 Enduro version

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BOYESEN RAD VALVE TC SX 125 17-22, BLOCK RAD-41E Polisport Alpinestars Tech 10 is theBoyesen Rad Valve RAD 41E RAD41E 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