Katech KoolFlow LTx 160° High-Performance Billet Thermostat

The Katech KoolFlow™ LTx 160° High-Performance Billet Thermostat is engineered to deliver precise, consistent temperature control for high-output GM LTx performance engines. Designed to open at 160 degrees, Katech KoolFlow™ helps reduce heat soak, stabilize coolant temperatures, and support optimal power delivery during aggressive street driving, track use, and sustained high-load conditions.

Precision CNC-machined from premium billet aluminum, the KoolFlow™ thermostat offers superior strength, durability, and reliability compared to conventional cast or stamped thermostats. The black anodized finish provides excellent corrosion resistance while delivering a clean, stealth motorsports appearance. Tight machining tolerances ensure predictable opening characteristics and smooth coolant flow, helping minimize temperature fluctuations and thermal spikes.

Designed specifically for GM LT1, LT4, LT5 L83, and L86 engines, Katech KoolFlow™ Thermostat integrates seamlessly with the included billet and OEM-style thermostat housing, promoting proper sealing and long-term leak resistance. Built to the same standards trusted in professional racing environments, this thermostat delivers uncompromising cooling performance for enthusiasts who demand precision-engineered solutions.

Features & Benefits

• 160° Calibrated Opening Temperature Thermostat for Performance Cooling

• CNC-Machined 6061 T6 Billet Aluminum Housing 

• 4 ORB to 8mm Hose Barb with Integrated Double O-ring Seal

• Durable Black Anodized Finish for Corrosion Resistance and Stealth Appearance

• M6 x 25 Zinc-plated Fasteners Included

• Smooth, Predictable Coolant Flow Characteristics

• Helps Reduce Heat Soak and Thermal Instability

• Designed for LTx Engine Applications

• Ideal for Performance Street, Track, and Race Applications

• Housing Machined and Anodized in the USA

FITMENT | GM Gen V LT1, LT4, LT5 L83, and L86 Engines

PART NUMBER |  KAT-A7963