Part number BLK90120 is a black-anodized billet aluminum thermostat housing crafted for Chevrolet small- and big-block V8 engines. It features a 0° straight-up outlet for 1½″ inside-diameter radiator hoses and includes a swivel flange that rotates a full 360° for versatile hose alignment. The housing seals with dual Buna-N O-rings—no gasket required—and includes stainless steel mounting hardware for reliable installation. Its compact size and durable finish make it ideal for custom engine swaps and performance builds.

• Application: Chevy small- and big-block V8 engines
• Outlet orientation: 0° straight-up, 1½″ hose connection
• Swivel range: 360° base rotation
• Material: 6061-T6 billet aluminum
• Finish: Black anodized
• Sealing: Dual Buna-N O-rings
• Hardware: Stainless steel fasteners included