ARP Thermostat Housing

ARP thermostat housing bolt kits are engineered fasteners for securing the thermostat housing (water neck) on performance and racing engines. They replace stock bolts with higher-quality hardware. This gives you a more secure, reliable seal and a cleaner look in the engine bay.

Key Features:

• Made by ARP, a brand known for high-strength fasteners used in racing and high-performance engines
• Available in stainless steel or chrome moly construction, depending on the part number
• 12-point head designs are available for easy wrenching in tight spaces and a clean, finished appearance
• Built to hold up to repeated heat cycles, vibration, and exposure to coolant
• Designed to give consistent clamping force on the thermostat housing
• Suited to street performance, racing, and engine rebuild projects

Choose the kit with the right part number for your engine. Each kit is designed to replace the factory thermostat housing bolts with a stronger, longer-lasting upgrade.