Racingline Billet Coolant Outlet for VAG EA888 Gen.3/4 1.8T/2.0T Engines
The factory plastic coolant outlet on EA888 engines is a well-known weak point. Sitting right next to the turbo, it spends its life baking in high temperatures until the plastic eventually becomes brittle, cracks, and dumps your coolant onto the road. Racingline’s billet aluminium replacement is a permanent fix, designed to outlast the engine itself.
This direct replacement for OEM part 06K 121 143 swaps the original plastic housing for a CNC-machined aluminium unit that simply will not warp, soften or split under heat. It’s a straightforward upgrade that removes one of the most common points of failure on the popular EA888 platform.
Why upgrade to the billet outlet?
- Prevents sudden coolant loss caused by the plastic original cracking near the turbo.
- CNC-machined from solid billet aluminium for strength and long-term heat resistance.
- Anodised finish protects against corrosion from coolant additives, oil and road salt.
- Direct fit replacement using the original mounting points and hoses.
- Supplied with a pre-installed O-ring, ready to bolt straight on.
What’s in the box?
- 1x Racingline Billet Coolant Outlet
- 1x Pre-installed O-ring
Installation
Fitting is straightforward for anyone comfortable with basic spanner work. You’ll need a Torx T30 driver, hose clip pliers and a rubber hose clamp to pinch off the coolant line during the swap. Top up and bleed the cooling system once installation is complete.
Fitment
Designed for vehicles fitted with the 1.8 TSI and 2.0 TSI EA888 Gen.3 and 2.0 TSI EA888 Gen.4 engines. This covers a wide range of popular VW, Audi, SEAT, Skoda and Cupra models, including Golf GTI, Golf R, S3, TT, Leon Cupra, Octavia vRS and many more.
Please use the vehicle lookup tool or check the Vehicle Fitment tab to confirm compatibility with your specific car.
Replaces OEM Part Number
06K 121 143
Applications
Please note, customers are wholly responsible for checking fitment for their vehicle.





















