-16 AN LS thermostat housing billet aluminum on a white background
LS swap AN coolant housing replacement with text on a white background
Close-up of a LS water neck conversion to -16 AN on a GM LS Engine
Corvette LS thermostat housing upgrade on a gray background
Close-up of a billet LS thermostat housing for tube chassis build with a metallic finish
-16 AN Thermostat Housing for GM LS Engines
-16 AN LS thermostat housing billet aluminum on a white background
LS swap AN coolant housing replacement with text on a white background
Close-up of a LS water neck conversion to -16 AN on a GM LS Engine
Corvette LS thermostat housing upgrade on a gray background
Close-up of a billet LS thermostat housing for tube chassis build with a metallic finish
-16 AN Thermostat Housing for GM LS Engines

-16 AN Thermostat Housing for GM LS Engines

WA01000LS

$79.99
/
Shipping calculated at checkout.

Wide Open Design’s -16 LS Thermostat Housing makes plumbing your LS cooling system simple, clean, and reliable, especially in tight tube chassis or custom swap applications.

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.

This housing is designed around the OEM 1997–2008 Corvette LS thermostat and gasket, allowing you to retain factory function with upgraded plumbing capability.

Why Builders Choose This Housing

  • Converts LS coolant outlet to clean -16 AN plumbing
  • Retains OEM Corvette thermostat function
  • Fits all GM LS-based engines
  • Ideal for LS swaps, tube chassis, buggies, and rock crawlers
  • Precision machined billet aluminum
  • Made in the USA

Included Items:

Specifications
  • Fits: ALL Chevy GM LS-based engines
  • Thermostat Compatibility: OEM 97–08 Corvette Thermostat & Gasket
  • Hose Size: -16 AN
  • Material: Billet Aluminum
  • Manufacturing: Precision Machined in the USA

Cooling System Comparison Table

Factory LS Water Neck WOD -16 AN Thermostat Housing
Bulky molded hose routing Clean -16 AN hose routing
Limited custom plumbing options Designed for AN coolant systems
Can be difficult in tube chassis builds Ideal for tight custom chassis layouts
Factory appearance Billet race-inspired appearance
Often removed during swaps Retains proper thermostat function
Fitment

Compatible with all GM LS-based engines including:

Engine

Fits

LS1

✓

LS2

✓

LS3

✓

LS6

✓

LQ4

✓

LQ9

✓

5.3 LS

✓

Ideal for:

  • LS swaps
  • Tube chassis buggies
  • Rock crawlers
  • Ultra4 race cars
  • Rock bouncers
  • Custom Jeeps
  • Sand cars
  • Prerunners
  • Engine swap projects
Tech Insight

Does this housing include a thermostat?

No. Thermostat and fittings are sold separately unless otherwise noted.

Will this fit an LS3?

Yes. It fits all GM LS-based engines including LS1, LS2, LS3, LS6, LQ4, LQ9, and 5.3L variants.

What thermostat does this use?

It is designed for the OEM 1997–2008 Corvette LS thermostat and gasket.

Why not remove the thermostat on an LS swap?

The ECU relies on coolant temperature for warm-up, drivability, and engine management. Keeping a thermostat helps maintain proper operation.

What size hose does this housing use?

This housing is designed for -16 AN coolant plumbing.