Heavy-duty balancer bolt and washer set engineered for 1965–1990 Chevrolet 396–454 Mark IV big-block engines. Made from Grade 8 alloy steel, this set is built to handle stock, street-performance, drag, and circle-track use. The tall hex-head fastener offers better wrench grip, while the thick, precision-ground washer ensures even clamping force and accurate torque during installation. A zinc dichromate finish provides long-lasting corrosion protection.

• Fits 1965–1990 Chevy 396–454 Mark IV big-block engines
• Grade 8 alloy steel construction
• Zinc dichromate coating for durability
• Tall hex head reduces slippage during tightening
• Thick parallel-ground washer ensures uniform torque