-20 AN LS Thermostat Housing for GM LS Engines
-20 AN LS Thermostat Housing for GM LS Engines
-20 AN LS Thermostat Housing for GM LS Engines
Close-up of a Corvette LS thermostat housing upgrade with red accents
Close-up of a billet LS thermostat housing for tube chassis build with a metallic finish
-20 AN LS Thermostat Housing for GM LS Engines
-20 AN LS Thermostat Housing for GM LS Engines
-20 AN LS Thermostat Housing for GM LS Engines
Close-up of a Corvette LS thermostat housing upgrade with red accents
Close-up of a billet LS thermostat housing for tube chassis build with a metallic finish

-20 AN LS Thermostat Housing for GM LS Engines

WA01001LS

$79.99
/
Shipping calculated at checkout.

Wide Open Design’s -20 LS Thermostat Housing makes plumbing your LS cooling system simple, clean, and reliable, especially in tight tube chassis or custom swap applications. This housing is designed around the OEM 1997–2008 Corvette LS thermostat and gasket, allowing you to retain factory function with upgraded plumbing capability.
Any fuel injected LS engine relies on coolant temperature data for proper ECU function. Removing the thermostat can negatively impact warm up cycles, drivability, and engine management. That’s why we designed this housing to work with an OEM-style thermostat- just like GM intended.

Included Items

  • (1) -20 LS Thermostat Housing
    Note: Thermostat and fittings sold separately

If you need a thermostat, this housing works perfectly with:

Specifications 
  • Fits: ALL Chevy GM LS-based engines
  • Thermostat Compatibility: OEM 97–08 Corvette Thermostat & Gasket
  • Hose Size: -20 AN
  • Material: Billet Aluminum
  • Manufacturing: Precision Machined in the USA
Fitment 

Compatible with all GM LS-based engines including:

  • LS1
  • LS2
  • LS3
  • LS6
  • LQ4 / LQ9
  • LM7 / 5.3L variants

Ideal for:

  • LS swaps
  • Tube chassis builds
  • Rock crawlers
  • Ultra4-style race cars
  • Custom off-road applications
Tech Insight 

By converting to AN plumbing and retaining an OEM-style thermostat, you maintain proper ECU coolant control while gaining:

  • Replace the bulky factory water neck
  • Eliminate molded rubber coolant hoses
  • Allow direct -20 AN hose plumbing
  • Clean up engine bay appearance
  • Remove guesswork from hose sizing
Back to Cooling Systems