Billet Specialties Chevy Small/Big Block Billet -20An Thermostat Housing

Whether you're running a braided line for your cooling system, Billet Specialties now offers thermostat housings in -20 AN sizes for small block/big block Chevy. Choose between a machined or black anodized finish. Compatible with the stock thermostat or for racing without a thermostat, these housings are precision machined from 6061-T6 aluminum and include stainless hardware and O-ring for optimal performance.