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Designed for engines producing up to 500hp
all our models include a 0-90 ohm GM sending unit
supercharged
and replacement filters are available
Chevy GM LS 5.670" 25% Underdrive Harmonic Balancer Damper SFI 18.1 Designed for engines producing upSpeedmaster 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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