Fluidampr 620101 - Small Block Chevy Harmonic Balancer

Premium Harmonic Balancer for Chevy Small Block V8 & V6 Engines

The Fluidampr 620101 is a high-performance viscous harmonic balancer designed for Chevy small block engines from 1955 to 1995. Engine modifications and high-rev applications can create destructive torsional vibrations, leading to crankshaft wear, reduced efficiency, and potential engine failure. The Fluidampr 620101 harmonic balancer eliminates these risks by self-tuning in real-time, providing smooth performance, increased power, and enhanced engine longevity.

Key Features & Benefits

• Eliminates Harmful Torsional Vibrations – Protects the crankshaft and critical engine components.
• Increases Horsepower & Torque – Reduces power loss caused by inefficient vibration control.
• Self-Tuning Viscous Technology – Continuously adjusts in real-time to control engine vibrations.
• Improves Fuel Efficiency – Ensures smoother power delivery, reducing parasitic losses.
• Built for Performance Applications – Perfect for stock or modified Chevy small block engines.
• Precision CNC-Machined & Balanced – Ensures optimal timing accuracy and engine stability.
• Direct Bolt-On Installation – No tuning required, simple plug-and-play upgrade.

Compatible Chevy Small Block Engines

The Fluidampr 620101 harmonic balancer is engineered for Chevy V6 and V8 small block engines, including:

• Chevy 4.3L 262 V6
• Chevy 4.6L 283 V8
• Chevy 5.0L 305 V8
• Chevy 5.0L 307 V8
• Chevy 5.4L 327 V8
• Chevy 5.7L 350 V8
• Chevy 6.7L 409 V8

Not compatible with LT1 engines produced after 1992.

Technical Specifications

• Material: Steel Construction
• Coating: Black Zinc Finish (Corrosion Resistant)
• Outside Diameter: 6.25"
• Weight: 7.9 lbs
• Length: 2.335"
• Construction: One-Piece CNC Machined
• Keyway: Single 3/16"
• Bore Diameter: 1.2450"
• Exterior Timing Marks: 90°, 180°, and 270°
• Made in the USA 🇺🇸

Why Upgrade to the Fluidampr 620101?

Your OEM rubber harmonic balancer degrades over time, leading to poor vibration control and crankshaft stress. The Fluidampr 620101 offers long-lasting durability and precise vibration dampening, making it the best choice for high-performance and daily-driven Chevy small block engines.

Recommended Complementary Upgrades

• Fluidampr Import Performance Dampers – Explore more viscous dampers for high-performance builds.

• By KLM Performance