SpeedFactory Billet Thermostat Housing for B/D Series

SpeedFactory Racing Billet B/D Series Thermostat Housing

Upgrade your cooling system with the SpeedFactory Racing Billet B/D Series Thermostat Housing, engineered for builders who want premium quality, improved reliability, and clean engine bay aesthetics. Designed as a complete replacement for the OEM cast housing, this billet thermostat housing eliminates leak-prone modular fittings and the hassle of wrestling oversized wrenches in tight spaces. It’s a smarter, stronger solution for anyone refreshing or upgrading their Honda/Acura cooling system.

Precision CNC-machined from 6061-T6 billet aluminum, this thermostat housing offers exceptional durability, a sleek black anodized finish, and a laser-etched SpeedFactory Racing logo for a refined look. It includes an 1/8” NPT accessory port for coolant sensors, plus provisions for the OEM cooling fan switch and engine harness ground. With a dual bolt pattern that fits both B-Series and D-Series engines (except the D16Z6), it delivers broad compatibility while maintaining perfect OEM fitment.

Available in your choice of -16AN or 32mm hose-end versions, this billet housing supports high-performance cooling setups often found in turbocharged or track-driven cars. Whether you’re chasing efficiency, dependability, or cleaner routing, this upgrade gives your cooling system the precision and confidence it deserves.

Fitment

• 1988-2000 Honda Civic
• 1990-2001 Acura Integra
• 1988-1991 Honda CRX
• 1993-1997 Honda Del Sol
• 1997-2001 Honda CR-V
• Fits B-Series (1988-2001) and D-Series (1988-2000) engines — does NOT fit D16Z6

Includes

• Billet Thermostat Housing
• 1/8” NPT Pipe Plug

Key Features

• Precision CNC-machined 6061-T6 billet aluminum for superior strength
• Black anodized finish prevents corrosion and enhances durability
• 1/8” NPT accessory port for coolant pressure or other sensors
• Supports OEM fan switch and engine harness grounding

Note: If installing a pressure sensor directly into the housing, use a small-body sensor such as AEM’s stainless pressure series for proper clearance.