ARP Thermostat Housing Bolt Kit Hex Head

The ARP Thermostat Housing Bolt Kit with hex heads is a fastener upgrade for the engine coolant thermostat housing (also called a thermostat housing bolt set or water neck bolt kit). ARP is a well-known maker of high-performance fasteners. These kits replace the standard housing bolts with hardware built for the heat cycles and vibration of demanding engine use.

Key Features:

• Hex head design allows installation with common sockets and wrenches
• Made by ARP, a brand known for precision-manufactured fasteners for performance and racing engines
• Replaces factory thermostat housing bolts with stronger, more durable hardware
• Helps hold the housing securely against its gasket to support a reliable coolant seal
• Available in multiple configurations, each matched to a specific application

Choose the kit that matches your application from the variants listed on this page. It is a simple upgrade that adds durability and a tidy appearance to the thermostat housing area.