BOYESEN 1998 RM125 BOYESEN RAD BLOCK RAD-21D Heat Shield Square or round (depending on

Square or round (depending on the machine) perforated steel inner cores make for optimum flow

KTM 250 XC-W 2003

YZ 450F 03-07

Built to be your go-to layer—clean

1990 Suzuki LT250R Quad Racer

BOYESEN 1998 RM125 BOYESEN RAD BLOCK RAD-21D Heat Shield Square or round (depending onBoyesen Rad Valve RAD 21D RAD21D 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