Overview
Solve the two most common coolant-related failures on the Audi 4.0T platform with the TGK Motorsport Coolant Reliability Bundle — combining our Billet Front Thermostat Piping Kit and Coolant Shutoff Valve Delete Kit for a permanent, leak-free solution built for long-term performance and peace of mind.
The Audi 4.0T engine is notorious for elusive coolant leaks and hidden overheating risks, often stemming from two weak points in the cooling system: the plastic thermostat coolant elbow and the vacuum-actuated coolant shutoff valve. These factory components may seem minor, but both are known to fail in ways that can lead to coolant loss, engine overheating, or even catastrophic damage — often without obvious symptoms until it's too late. This bundle includes both of TGK Motorsport's billet-engineered solutions, eliminating plastic failure points and upgrading critical seals to ensure maximum durability under all operating conditions.
Details
Product specifications:
- Material: 6061-T6 Aluminum, CNC-Machined
- Fitment: Audi 4.0T Platform
- Installation Time: 2-3 Hours
- Warranty: Lifetime
- Installation Instructions: Available Online
Features and benefits:
- Dual-Component Solution — Addresses both primary coolant failure points in a single comprehensive upgrade bundle.
- 6061-T6 Billet Construction — CNC-machined aluminum components eliminate plastic failure points and provide superior durability.
- Enhanced Sealing System — Dual-gasket design on thermostat piping provides redundant sealing and prevents cold-start leaks.
- Shutoff Valve Delete — Eliminates dangerous vacuum-actuated valve that can fail closed and cause catastrophic overheating.
- Full-Time Coolant Flow — Restores continuous circulation for optimal cooling performance under all conditions.
- Track-Ready Reliability — Built for daily driving, spirited use, and demanding track conditions with permanent leak prevention.
Fitment
| Years | Make | Model | Engine | Trim |
|---|---|---|---|---|
| 2011-2018 | Audi | A8 | 3.0T | All |
| 2011-2018 | Audi | A8 | 3.0T | All |
| 2012-2014 | Audi | RS6 Avant | 4.0TT V8 | Not sold new in US - grey-market/private-import only. Shares C7 4.0TT V8 platform with S6/S7/RS7 |
| 2012-2015 | Audi | A6 | 2.0T / 3.0T | All |
| 2013-2015 | Audi | S6 | 4.0TT V8 | All |
| 2013-2015 | Audi | S7 | 4.0TT V8 | All |
| 2013-2018 | Audi | A8 | 4.0T | All |
| 2013-2018 | Audi | A8 | 4.0T | All |
| 2013-2018 | Audi | S8 (D4) | 4.0TT V8 | All |
| 2013-2018 | Audi | S8 | 4.0TT V8 | All |
| 2013-2018 | Audi | S8 | 4.0TT V8 | All |
| 2014-2015 | Audi | RS7 | 4.0TT V8 | All |
| 2015-2018 | Audi | RS6 Avant | 4.0TT V8 | Not sold new in US - grey-market/private-import only. Shares C7.5 4.0TT V8 platform with S6/S7/RS7 |
| 2016-2018 | Audi | RS7 | 4.0TT V8 | All |
| 2016-2018 | Audi | S6 | 4.0TT V8 | All |
| 2016-2018 | Audi | S7 | 4.0TT V8 | All |
| 2020-2025 | Audi | S6 | 2.9TT V6 | All |
| 2020-2025 | Audi | S7 | 2.9TT V6 | All |
