Audi 4.0T Front Thermostat Billet Piping Kit 10MM Barb | Audi 4.0T | TGK Motorsport

Overview

Eliminate the elusive cold-temperature coolant leak on your Audi 4.0T with the TGK Motorsport Front Thermostat Billet Piping Kit — engineered to replace the factory plastic coolant elbow with a precision-machined 6061 aluminum solution featuring a dual-gasket design for maximum sealing and long-term reliability.

The factory Audi 4.0T cooling system utilizes a plastic coolant elbow at the front thermostat housing that is a common failure point. This component relies on a single O-ring to seal against the thermostat housing, which over time becomes prone to hardening, deformation, and leakage — especially under cold start conditions. These leaks are often difficult to trace, leading to recurring coolant loss without an obvious source.

Details

Product specifications:

• Material: 6061-T6 Aluminum
• Application: Audi 4.0T Front Thermostat Housing
• Sealing Design: Dual-Gasket Configuration
• Finish: Precision CNC Machined
• Installation: Direct OEM Replacement

Features and benefits:

• 6061-T6 Aluminum Construction — Superior strength and thermal resistance compared to failure-prone factory plastic elbow.
• Dual-Gasket Sealing Design — Redundant seal eliminates coolant leaks even under high-stress conditions and engine aging.
• Precision CNC Machined — Exact OEM fitment with superior surface finish for optimal gasket sealing performance.
• Extreme Thermal Cycling Resistance — Built to withstand repeated heat cycles that degrade and crack factory plastic components.
• Cold Weather Performance — Maintains reliable seal during cold starts when factory O-rings become rigid and prone to failure.
• Permanent Solution — Built to outlast the life of your engine, eliminating recurring coolant leak issues.

Fitment