VW / Audi 1.8T Aluminium Coolant Pipe Flange Upgrade Kit – 4-Piece (MK4 Golf, TT, GTI)

If you’re doing a proper 1.8T refresh or build, replacing all four coolant pipe flanges at once is the right move. The factory plastic flanges are notorious for cracking and leaking as the engine ages — this 4-piece aluminium kit tackles them all in a single job, saving you from chasing coolant leaks one at a time.

Precision aluminium construction handles heat and pressure far better than the OEM plastic parts. A must-do upgrade alongside timing belt, water pump and thermostat work on MK4 Golf, Jetta, TT and GTI 1.8T engines.

• Quantity: 4-piece kit (full flange set)
• Material: Aluminium (replaces factory plastic)
• Fitment: VW MK4 Golf, Jetta, GTI 1.8T / Audi TT 1.8T
• Direct replacement, no modification required
• Eliminates all OEM plastic coolant flange failure points