Chevy GM LS 5.670" 25% Underdrive Harmonic Balancer Damper SFI 18.1 Whether it's a new build

Whether it's a new build or just general maintenance Speedmaster has what you need to get out on the road

These chrome valve cover bolts from PCEnot only anchor your valve covers

Speedmaster offers these pushrod length checkers as easy and economical tools to lay out and determine proper pushrod length for proper valvetrain geometry

Individually milled from super durable 6061 T6 aluminum billets

and come in machined or polished finishes to suit your application needs

Chevy GM LS 5.670" 25% Underdrive Harmonic Balancer Damper SFI 18.1 Whether it's a new buildSpeedmaster Harmonic dampers feature a bonding process which adheres the elastomer to the i. d. of the inertia ring and the o. d. of the hub, utilizing a strong adhesive along with an improved elastomer to create a much stronger bond. The inertia ring rotates harmonically with the engine and absorbs the torsion vibration from the rotating assembly at any frequency and RPM. It extends the life of crankshaft and bearing which allows the engine to