GORILLA M8 ROCKER SHAFTS SHIMS; Qty. 6 of 3 thicknesses: 0.003″; 0.005″; 0.010″Quiet your engine and reduce wear by tightening the rocker arm to cylinder head end play clearance. FEULING recommends an ideal side clearance of 0.0035″ – 0.0045″ for optimum rocker arm oil psi and noise reduction. Will benefit stock engines and highly recommended for engines with high lift camshafts or higher pressure valve springs.NOTE: These shims should be installed by a professional; one who can make correct end play measurements and can install and tighten rocker shaft nuts/bolts without damaging shims.Check out our #1232 Gorilla rocker shafts and ARP stud/nut kit to further bulletproof your valve train!MADE IN U.S.A.
