This replacement O-ring kit is designed for use with Billet Specialties thermostat housing assemblies on Chevrolet engines. Each O-ring measures 2½″ outside diameter and is made from durable rubber to ensure a reliable, leak-free seal. Ideal for both small block and big block Chevy applications, this set includes two O-rings for use with dual-port or serviceable housings.

• Thermostat housing O-ring set for Chevy
• Sold as a pair
• 2½″ outside diameter
• High-quality rubber construction
• Compatible with Billet Specialties thermostat housings
• Ensures a tight seal in the cooling system