Our new 2018 Product Catalogue has been released!
Crow has researched with oil additive manufacturers the optimum level of ZDDP for maximum resistance to scuffing and oil film break down under the extreme loads of high performance flat tappet engines in road and race applications.
With more aggressive cam profiles and heavier valve springs now common in street and entry-level race applications, the limitations of extruded alloy as a rocker material are clearly evident. The flex alloy rockers exhibit reduces valve lift and horsepower potential and these stresses can lead to arm failure.
These problems have lead to a move to steel rocker arms in the upper levels of motor sport and now Crow Cams bring the strength and stiffness of steel rockers into the budget of every street performance engine builder.