Innovators West | Small Block Chevy 7″ Externally Balanced Harmonic Damper #103

Small Block Chevy 7" Externally Balanced Harmonic Damper

Part Number: #103

Ensure maximum engine stability and durability with the #103 7" externally balanced harmonic damper, purpose-built for Small Block Chevy applications. Designed to control crankshaft harmonics effectively, this damper is ideal for stock and modified engines producing up to approximately 1000 horsepower.

Featuring the Chevy bolt pattern, this unit is fully compatible with OEM pulleys and hardware, making installation straightforward while maintaining factory alignment. Precision-machined for balance and reliability, it plays a critical role in reducing vibration, improving timing accuracy, and extending the life of your engine’s rotating assembly.

Built to meet and exceed SFI 18.1 standards, this damper is certified for performance and racing use, with SFI identification clearly marked via front sticker and rear stamping.

Features & Benefits:

• 7" outer diameter for effective harmonic dampening
• Externally balanced – suits 400ci & larger Small Block Chevy engines
• Compatible with OEM pulleys and hardware (Chevy bolt pattern)
• Suitable for stock and modified engines up to ~1000hp
• Precision-machined for optimal balance and durability
• Reduces crankshaft vibration and harmonic distortion
• Improves engine reliability and component lifespan
• Exceeds SFI 18.1 standards (SFI certified and marked)

Specifications:

• Outer Diameter: 7"
• Weight: 9.5 lbs
• Keyway: Single 3/16"

What’s Included:

• 7" externally balanced harmonic damper

Applications:

• Small Block Chevy (externally balanced 400ci & larger engines)

A proven solution for performance and reliability, the #103 harmonic damper is an essential upgrade for keeping your Small Block Chevy running smooth and protected under load.