Chevy S/S W/P Pulley Bolt Kit

The ARP 430-6802 Chevy Stainless Steel Water Pump Pulley Bolt Kit is a four-piece fastener set engineered for Chevrolet small-block and big-block water pump applications. Each bolt features a 5/16-24 thread with 0.750-inch length and a 3/8-inch 12-point head, manufactured from polished stainless steel to withstand corrosion, thermal cycling, and mechanical stress in high-heat engine compartments.

ARP (Applied Racing Products) bolts are recognized in the performance and restoration communities for their precision tolerances and material integrity. The 12-point head geometry distributes load across a wider surface area compared to six-point designs, reducing thread stripping risk during installation or removal. Stainless construction resists salt-air corrosion and oxidation, critical for vehicles in coastal environments or those exposed to road salt during winter months. The polished finish serves both functional and aesthetic purposes—it reflects heat and maintains appearance in visible engine bay locations.

This kit is intended for engine builders, restoration specialists, and enthusiasts performing water pump replacement or reassembly on Chevrolet engines. The exact specifications ensure proper seating and clamping force at the pulley-to-pump interface, which is essential for preventing coolant leaks and maintaining proper serpentine belt alignment. Original equipment or OEM-equivalent fasteners in this application are often prone to rust or corrosion; upgrading to stainless hardware extends service life and simplifies future maintenance.

The kit ships as a complete four-bolt set, matching the typical fastener count required for most Chevrolet water pump pulley assemblies. Buyers should verify fitment against their specific engine block and year before installation, as some Chevy variants may use alternative fastener patterns or sizes.