An unbeatable combination of strength, rigidity and value for money. With more aggressive cam profiles and heavier valve springs now common in street and 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 the stresses can lead to arm failure Crow Cams new stainless steel stud type roller rockers offer virtually zero arm deflection for maximum valve lift and unrivalled resistance to arm breakage. The oversize rocker shafts allow for 7/16 studs to be used without comprising shaft strength. The larger shafts and needle roller bearings also offer greater load capacity for high valve springs pressures. Every set come complete with poly locks for added value and simple, secure valve lash adjustments. These are stud mount rockers so heads will require machining to fit studs and guide plates.