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Constructed from a composite material with a steel core
This feature is sometimes called an air gap design
Spacer can be reused if disassembly of the carrier is required
Tthese Speedmaster aluminum water pump pulleys
They feature larger radius stud fillets for extra strength
Oldsmobile 455 6.500" External SFI-Rated Damper Harmonic Balancer Constructed from a composite materialSpeedmaster harmonic balancers are crafted from high quality steel and feature a tuned elastomer for optimal engine performance. They include a strong bonding process, easy to read timing marks, and an advanced design to absorb engine vibrations, extending the life of the crankshaft and bearings for enhanced power and torque.
