Rocker Shaft Shims - 0.010" - M8 1229

Rocker Shaft Shims - 0.003" - M8 1227

Rocker Shaft Shims - 0.005" - M8 1228

In an effort to perfect Milwaukee-Eight® engine valve train geometry, while improving durability, JIMS® has developed performance rocker shafts and proprietary hardwareThe rocker arm shafts are...