Fluidampr Viscous Harmonic Damper – Honda B Series – 35% Underdrive Alternator-Only Pulley

Fluidampr Viscous Harmonic Damper – Honda B Series – 35% Underdrive Alternator-Only Pulley

Application: Honda 1990-2001 B Series
Part Type: Viscous harmonic damper (35% underdrive alternator-only pulley)
Part Number: 620601

Performance upgrades amplify the harmful crankshaft torsional vibration that occurs naturally in every engine. Fitting a Fluidampr viscous damper reduces wear on the main bearings and timing gear, delivers more accurate valvetrain operation, and lowers the risk of crank failure.

Unlike rubber-based dampers, Fluidampr automatically adapts to your modifications and then continuously self-tunes in real time for optimum damping at peak levels and across a broad, changing frequency range. As the engine revs, torsional vibration suspends the inertia ring and reduces the weight felt on the crankshaft, helping maintain quick revs while preserving optimum damping.

A must-have for instant protection against turbo, supercharger and nitrous power surges.

Choosing between the two B Series Fluidampr dampers: this 620601 has a 35% underdrive pulley that drives the alternator only — it suits track and drag cars with the power steering and air conditioning removed. If your car keeps power steering and A/C, choose the 590601 full pulley version.

Key Features

• Precision machined and computer balanced components
• Never needs to be tuned or rebuilt
• SFI approved
• Self-tuning viscous (silicone) damping
• Made 100% in the U.S.A.
• ISO certified

Important Notes

• Alternator drive only — no power steering or air conditioning drive.
• 35% underdrive slows the alternator relative to the factory pulley.

Vehicle Fitment

• Honda 1990-2001 B Series engines

Not sure which suits your car? Email sales@coore.com.au and our team will confirm fitment.