Pioneer 859013 Harmonic Balancer Bolt Kit Big Block Chevy Gen IV

The Pioneer 859013 is a harmonic balancer bolt kit engineered for Big Block Chevrolet Gen IV engines, including the 366, 396, 402, 427, and 454 cubic inch V8 applications. This kit delivers the correct hardware needed to properly secure the harmonic balancer (crankshaft damper) to the crankshaft snout with confidence.

Key Features:

• Thread Size: 1/2"-20 with a 1.500" under-head length
• Head Style: Hex head with a 3/4" socket size for easy installation and torquing
• Material: High-tensile strength steel, heat treated to 180,000 PSI
• Finish: Yellow zinc dichromate for corrosion resistance
• Includes: High-tensile hex head bolt, extra-thick parallel ground washer for uniform torque distribution, and a high-tensile lock washer
• Cold-rolled threads for superior thread engagement and strength

Part of Pioneer's Performance Fastener line, the 859013 is hardened and heat-treated for reliable clamping force in both street and performance engine builds. The included extra-thick ground washer promotes more uniform torque loading across the balancer hub, helping prevent loosening under the torsional stress of high-performance operation.