Speed Pro Speed Pro Piston Rings 4.280" Bore File Fit 5/64 x 5/64 x 3/16" Thick - Standard Tension RS004C1510 Threaded Top Terminals 8 mm Valves ATM5763 SMK340H Size:4X-Large (67-68)

Threaded Top Terminals

Valve spring upgrade requiredThe COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development

Tape Measure

Easily adjust the mechanical advance with the supplied springs and stop bushings to fit your boat's needs

Steel studs screw into the engine block and stay there

Speed Pro Speed Pro Piston Rings 4.280" Bore File Fit 5 64 x 5 64 x 3 16" Thick Standard Tension RS004C1510 Threaded Top Terminals 8 mm Valves ATM5763 SMK340H Size:4X Large (67 68) Threaded Top Terminals Valve spring upgrade requiredThe COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development