ProX Piston Kit YZ450F '20 13.0:1 (96.95mm)

ProX Piston Kit CRF250R '04-09 + CRF250X '04-17 13.5:1 "ART"

ProX Steel Intake Valve/Spring Kit YZ450F'03-09+WR450F'03-15

ProX Con.Rod Kit KTM250SX-F '06-12 + KTM250EXC-F '07-13

ProX Piston Kit RM-Z250 '10-23 "ART" 13.4:1 (76.96mm)

ProX Complete Gasket Kit YZ450F '18-19

ProX Piston Kit KTM250SX-F '13-15 + 250EXC-F '14-23 13.9:1

ProX Piston Kit YZ250F '01-07 + WR250F '01-13 12.5:1 76,95mm

ProX Piston Kit CRF150R '07-09 11.7:1

ProX Valve Shim 9.48 x 2.40 mm. (5 pcs.)

ProX Valve Shim 9.48 x 2.55 mm. (5 pcs.)

ProX Valve Shim 9.48 x 2.45 mm. (5 pcs.)

ProX Valve Shim 7.48 x 2.75 mm. (5 pcs.)

ProX Valve Shim 7.48 x 2.55 mm. (5 pcs.)

ProX Valve Shim 7.48 x 2.25 mm. (5 pcs.)