This housing directly replaces the OEM cast unit and is available in either -16AN or 32mm hose end specific versions, with no leak-prone modular fittings to deal with or the frustration of trying to remove the AN line & having to fight with 2 large wrenches in a very tight area to get the line off without taking the fitting with it.

Includes an 1/8 NPT accessory port for a cooling system pressure sensor or temp sensor (not included) along with provisions for the OEM cooling fan switch and engine harness ground.

Product Features: 

• Precision CNC machined from 6061-T6 billet aluminum
• Black Anodized finish adds durability and eliminates corrosion
• Laser-etched SFR logo
• Dual bolt pattern fits both B & D Series (Except D16Z6)
• OEM fan switch port
• Engine harness ground provision
• x1 1/8 NPT accessory port (use for coolant pressure or temp sensor)

Includes:

• (1) Billet Thermostat Housing
• (1) 1/8 NPT Pipe Plug

Fitment:

• 88-01 B-Series engines
• 88-00 D-Series engines (Except D16Z6)

Notes: If installing a pressure sensor (NOT INCLUDED) directly into the housing rather than remote mounting with a -4AN line, you will need to use a small diameter body sensor such as the AEM stainless pressure sensors for fitting/hose clearance.

-16AN hose ends are large and may require adjustments to other items such as fill necks, scattershields, etc for clearance.