Part number 90820 is a high-quality straight-up thermostat housing made to fit small-block and big-block Mopar V8 engines (pre-1978). This billet-aluminum housing features a 1½″ ID outlet for standard radiator hoses, seals reliably with an O-ring, and includes stainless-steel mounting hardware. Its polished finish and precision machining eliminate common sealing issues associated with traditional gaskets, offering both performance and clean aesthetics.

• Application: Mopar V8 engines (SB/B, 1978 and earlier)
• Hose outlet: 1½″ inside diameter, straight-up orientation
• Material: 6061-T6 billet aluminum
• Finish: Polished billet
• Seal: O-ring included (no gasket needed)
• Hardware: Stainless-steel mounting bolts
• Compatibility: Direct fit for Edelbrock-style Mopar water ports
• Construction: CNC machined for leak-free sealing