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Nothing lasts forever
The 8-pinion rear planetary carrier is made from 4340 steel
They're designed with performance in mind
The dress up kit pieces are machined from stainless steel and aluminum
contributing to the overall efficiency and performance of your engine
Chevy GM LS 6.780" 10% Underdrive Harmonic Balancer Damper SFI 18.1 Nothing lasts foreverSpeedmaster 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
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