Summit Racing™ Harmonic Balancers

Key Points Summary

• Harmonic balancers absorb crankshaft vibration to protect engine internals and maintain ignition timing.

• Summit Racing offers both SFI 18.1-approved race dampers and OE-style replacements.

• Options include internal, external, and neutral balance designs in steel or elastomer construction.

• Clear timing marks make installation and setup easier.

• Performance balancers can also be used in street cars when matched correctly.

Summit Racing harmonic balancers help control crankshaft vibration, improve engine durability, and maintain timing accuracy. Whether you're building a high-RPM race engine or just replacing a worn factory unit, Summit has the damper you need. Our selection includes SFI 18.1-approved balancers for drag and circle track cars, plus OE-style replacements for street builds. Choose from internal, external, and neutral balance designs to match your crankshaft setup. Available in steel or elastomer-style construction, with clear timing marks for easy setup.

Summit Racing LS Harmonic Balancers video review

FAQ Section:

Q. What does a harmonic balancer do?

A. A harmonic balancer—also called a damper—absorbs engine vibration caused by crankshaft torsional movement. It helps prevent damage to engine internals and ensures stable ignition timing.

Q. Are Summit Racing balancers SFI approved?

A. Many Summit Racing performance harmonic balancers are SFI 18.1 certified for racing use. Always check the product specs to confirm SFI approval.

Q. What’s the difference between internal, external, and neutral balance?

A. Internal balance means the rotating assembly is balanced without extra weight on the balancer or flywheel. External balance uses offset weight to help balance the assembly. Neutral balance balancers have no offset weight and are used on internally balanced engines.

Q. Can I use a performance balancer on a street car?

A. Yes. Summit offers high-quality dampers that work great on street engines. Just make sure the balancer fits your engine’s balance type and pulley setup.

Q. Do I need a special tool to install a harmonic balancer?

A. Yes. You should use a dedicated balancer installation tool to avoid damaging the crankshaft threads or balancer bore. Torque to spec and follow any included instructions.