Katech LS Billet Straight Thermostat Water Outlet 2004–2008

Katech LS Billet Thermostat Water Outlet 2004–2008

STRAIGHT WATER OUTLET · BILLET CONSTRUCTION · RACE-PROVEN HERITAGE

The Katech LS Billet Thermostat Water Outlet is designed for LS2 and early LS7 engines equipped with a compatible 2004–2008-style water pump requiring a straight water outlet. Originally developed for Katech road racing programs, this outlet provides a straightforward solution for race cars, custom cooling systems, and compatible LS engine swaps.

Precision-machined from billet aluminum and finished with a durable black anodized coating, the outlet features a hose-grip finish on the neck to help support secure radiator hose retention. It is designed for use with a compatible factory thermostat or the Katech KAT-6301 Thermostat Restrictor, depending on the requirements of the application.

Features & Benefits

• Billet Aluminum Construction
• Precision CNC-Machined for Accurate Fit and Consistent Quality
• Durable Black Anodized Finish
• Straight Water Outlet Design
• Hose-Grip Finish on the Outlet Neck Helps Support Secure Hose Retention
• Compatible With a Factory Thermostat or our  Katech Thermostat Restrictor KAT-6301
• Originally Developed for Katech Road Racing Programs
• Suitable for Race Cars, Custom Cooling Systems, and Compatible LS Engine Swaps
• Engineered and Machined at Katech Engineering, Clinton Township, Michigan, USA!

Specifications

• Material: Billet Aluminum
• Finish: Black Anodized
• Outlet Configuration: Straight
• Outlet Neck Outside Diameter: 1.75 Inches
• Thermostat Compatibility: Compatible Factory Thermostat or Katech Thermostat Restrictor
• O-Ring or Gasket Included: No

Vehicle & Engine Fitment

Representative Engine Applications

• GM LS2 6.0L Engines Equipped With a Compatible 2004–2008-Style Water Pump
• Early GM LS7 7.0L Engines Equipped With a Compatible 2004–2008-Style Water Pump
• Custom LS Engine Builds and Swaps Utilizing a Compatible LS2- or Early LS7-Style Water Pump

Important Fitment Notes

• Fitment Is Determined by the Water Pump and Thermostat Outlet Interface, Not Solely by the Vehicle or Engine Model
• Verify Water Pump, Thermostat, Sealing Method, and Bolt Pattern Compatibility Before Ordering
• Designed for Compatible 2004–2008-Style LS Water Pump Applications Requiring a Straight Water Outlet
• Radiator Hose Routing and Hose Size May Vary by Vehicle, Water Pump, and Custom Installation
• The Outlet Neck Has a 1.75-Inch Outside Diameter
• Confirm Radiator Hose Inside Diameter and Routing Before Installation
• The Katech KAT-6301 Thermostat Restrictor Replaces the Factory Thermostat and Is Intended for Off-Road Racing Applications
• O-Ring, Gasket, Thermostat, and Thermostat Restrictor Are Not Included

Why Choose Katech?

Since 1977, Katech has engineered championship-winning engines and precision performance components for professional motorsports, OEM development programs, engine builders, and performance enthusiasts. Every Katech product reflects a commitment to purposeful engineering, precision manufacturing, and proven performance.

The Katech LS Billet Thermostat Water Outlet was developed from Katech's road racing experience to provide a compact and durable straight water outlet for compatible LS cooling systems. Its billet aluminum construction, precision-machined design, and black anodized finish deliver the straightforward function and reliability expected from a Katech component.