R31 HOUSE SHIBATA RACING PISTON (1.3×4 hole)(R31S056)

A new 4-hole type is now available for the highly popular "SHIBATA Racing Piston"! The 1.3mm x 4-hole type was developed

through repeated tests based on "SHIBATA DR Damper Oil." Friction loss is reduced by making the piston thinner than before. By adopting a tapered shape, it is possible to change the characteristics of the damper by turning it upside down. Sold in a pack of 4. (R31S056) SHIBATA racing piston φ1.3mm x 4 holes 4 pieces Repeated tests based on "SHIBATA DR damper oil" Adopted 1.3 mm x 4 holes derived. Friction loss is reduced by making the thickness of the piston thinner than before. By adopting a tapered shape, it is possible to change the characteristics of the damper by using it upside down.