Katech LS3-Style Billet Thermostat Restrictor

Katech LS3-Style Billet Thermostat Restrictor

Billet Aluminum Water Restrictor for Compatible LS3-Style Race Cooling Systems.

The Katech LS3-Style Billet Thermostat Restrictor replaces the thermostat with a water restrictor in compatible 2008–2015 GM Gen III and Gen IV applications using an LS3-style thermostat configuration.

Race Use Only: Designed for off-road race cars. This component eliminates the thermostat's temperature-regulating function.

Features & Benefits

• Replaces the Thermostat with a Water Restrictor
• Billet Aluminum Construction
• Designed for Compatible LS3-Style Thermostat Configurations
• Intended for Off-Road Racing Applications Only
• Proudly Engineered and Manufactured by Katech Engineering in Clinton Township, Michigan, USA

Technical Specifications

• Product Type: Thermostat Replacement Water Restrictor
• Material: Billet Aluminum
• Application Range: Compatible 2008–2015 GM Gen III and Gen IV Applications
• Thermostat Configuration: LS3-Style; Verify Existing Assembly

What's Included

• One Billet Thermostat Restrictor

Thermostat housing & thermostat seal is not included.

Fitment & Installation Notes

Confirm the installed water pump and thermostat housing configuration before ordering. Model year and engine generation alone do not establish compatibility, particularly in engine swaps or modified cooling systems.

• Not Intended for Street-Driven Vehicles
• Designed to use OEM GM thermostat seal
• Verify Fit with the Existing Thermostat Assembly
• Inspect Housing and Sealing Components During Installation
• Check for Coolant Leaks After Assembly
• Monitor Coolant Temperature During Race Operation

Why Choose Katech

The Katech LS3-Style Billet Thermostat Restrictor is engineered and manufactured in Michigan for compatible race cooling systems. Katech Technical Sales can help identify the correct restrictor for your installed thermostat configuration.

For thermostat configuration and race cooling system questions, contact Katech Technical Sales at 586-791-4120.