ARP SB/BB Chevy 3/8-24 12pt lower pulley bolt kit

If you're working on the front of your small-block or big-block Chevy engine, securing the lower pulley is a critical step. This ARP bolt kit is designed to replace the stock bolt that holds your harmonic balancer or crank pulley in place. It's a well-built component that ensures your pulley stays firmly attached, which is essential for the proper operation of your accessory drives and timing.

This kit uses a 12-point head design, which offers a better grip for your socket compared to a standard hex head, especially in tight spaces or when dealing with stubborn fasteners. The 3/8-24 thread size is common for these applications, and ARP is known for making strong, reliable fasteners that can handle the stresses of engine operation. Using a quality bolt here helps prevent potential issues down the road, like a loose pulley that could affect belt alignment or even damage the crankshaft snout.