PROFORM 66510 SBC 6.75-Inch Harmonic Balancer, Internal Balance, Iron

Upgrade the crankshaft damping performance of your Small Block Chevy engine with the PROFORM 66510 harmonic balancer. Designed as an OE replacement, this internally balanced damper helps control torsional vibrations generated by the crankshaft, supporting smoother engine operation and helping protect critical rotating components. Its 6.75-inch outside diameter makes it a practical choice for compatible SBC applications where dependable fit and performance are required.
Built from durable iron, the PROFORM 66510 features a natural finish and an internal-balance configuration intended for engines that use an internally balanced rotating assembly. The construction is suited to street, performance, and restoration applications seeking a reliable replacement for a worn or damaged original balancer. Verify your engine’s balance arrangement, crankshaft specifications, and installation requirements before ordering to ensure proper compatibility.
This harmonic balancer is supplied as an individual replacement component and is engineered for Small Block Chevy applications. The PROFORM brand is recognized for performance-focused engine components, and part number 66510 provides a straightforward reference when matching this balancer to your build or replacement needs. Professional installation is recommended, including proper crankshaft surface inspection, alignment, and fastener torque procedures. This product is not air restricted and is not designated for truck-freight-only shipment.

Features:

• Brand: PROFORM

• Part Number: 66510

• Application: Small Block Chevy engines

• Type: OE replacement harmonic balancer

• Balance Type: Internal balance

• Material: Durable iron construction

• Finish: Natural

• Outside Diameter: 6.75 inches

• Quantity: Sold individually

• Shipping Classification: Not air restricted and not truck-freight-only