If you’ve ever swapped an LS engine into a buggy, crawler, race car, or custom chassis, you already know the factory thermostat housing becomes a problem almost immediately. The stock cast water neck:
- points the wrong direction
- interferes with chassis tubing
- creates ugly hose routing
- forces awkward radiator connections
- usually turns into a mess of rubber hoses and silicone couplers
And no matter how many times you rotate or reposition things, it never quite looks right. That’s exactly why Wide Open Design created the -20 LS Thermostat Housing Adaptor and the -16 LS Thermostat Housing Adapter. This simple billet adapter replaces the bulky factory LS water neck with a clean AN-style solution that dramatically improves:
- hose routing
- cooling system appearance
- radiator plumbing
- serviceability
- overall engine bay packaging
And unlike many aftermarket solutions, it still retains proper thermostat function exactly how GM intended.
Watch the LS Thermostat Housing Adapter Overview
Why Thermostats Still Matter on LS Swaps
One of the biggest mistakes people make on LS swaps is removing the thermostat entirely in an attempt to improve cooling. In reality, that often hurts cooling performance instead of helping it. Fuel-injected LS engines rely heavily on proper coolant temperature control for:
- ECU operation
- warm-up cycles
- drivability
- fuel management
- engine efficiency
Without a thermostat, coolant can actually circulate through the radiator too quickly to dissipate heat effectively. That’s why the WOD housing was specifically designed to retain OEM-style thermostat operation using the:
- 1997–2008 Corvette LS thermostat
- factory Corvette gasket
The Corvette thermostat platform also offers huge aftermarket support, allowing builders to choose:
- factory temperature thermostats
- lower-temp 160° thermostats
- performance cooling setups
Simple Installation, Massive Improvement
One of the reasons this part became so popular is because of how simple the upgrade actually is. No complicated fabrication required.
The housing:
- bolts directly in place of the factory LS water neck
- uses factory mounting hardware
- retains factory thermostat functionality
- installs in minutes
- immediately cleans up engine bay plumbing
For many builders, this becomes one of those “why didn’t I do this sooner?” upgrades once they see how much cleaner the cooling system becomes.
Supporting Better Cooling Performance
The thermostat itself plays a major role in regulating coolant flow through the engine and radiator. Using a proper thermostat:
- slows coolant enough to transfer heat effectively
- stabilizes engine operating temperature
- improves fan cycling behavior
- improves ECU control
- helps maintain cooling consistency
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