Delivers a permanent solution with OEM fit and finish.
Delivers a permanent solution with OEM fit and finish.
Engineered to ensure consistent coolant flow and eliminate the risk of overheating due to stuck valves.
Direct replacement precision-machined from 6061-T6 aluminum for improved durability, heat resistance, and long-term reliability.
Ensure your 4.0T engine reaches and maintains optimal operating temperature by replacing a sticking or failed thermostat assembly. Includes the housing and sealing gasket.
2X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
09-10-2026
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.
This is a must-have upgrade for anyone chasing down mystery coolant loss or proactively refreshing their 4.0T cooling system.
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.
Eliminate common coolant leaks and overheating risks on your Audi 4.0T with this durable, CNC-machined billet aluminum reliability upgrade.
Bulletproof your Audi 4.0T's cooling system and permanently eliminate leaks with this complete front billet aluminum upgrade kit.