Derale Thermostatically Controlled LS Engine Oil Cooler Bypass Adapter Kit 35621

  • Description
  • Brand


This Billet Aluminum LS Engine Adapter features a built in 180°F Thermostat to help reduce engine wear and horse power loss. The oil thermostat allows the oil to bypass the cooler until it reaches 180°F at which point the internal thermostatic valve will close and force 100% of the oil through the cooler while maintaining a constant pressure system. This process allows the engine to achieve the ideal operating temperature quicker before passing the oil through the cooler.


  • Activating temperature: 180°F
  • Ultra low profile design
  • Clears most long tube headers for LS swaps
  • 6061 Aluminum Billet
  • Viton o-rings
  • 1/8″ NPT Ports


  • Bypasses cooler until fluid temperature reaches 180°F
  • Provides quicker warm-up temperatures
  • Perfect for cold weather climates
  • Flows up to 20 gallons per minute
  • Rated up to 200 psi
  • Black anodized finish
  • -10AN ORB inlet/outlet ports for maximum flow

Part Number: DER-35621