Boost Leak Kit for Audi TT MK1 (8N) 180

While I did not create this YouTube video, I found it very helpful.

1. Print these two parts, ‘bungs’ as they call them in the UK.
2. Order a screw-on valve stem (½" or 12mm diameter)

Link to the Valve Stem on Amazon: TR416 Metal Valve Stems, High Pressure Valve Stems Outer Mount Fits 0.453 Inch Rim Hole Long 1 1/2", Universal Vehicle Tire Valve Stems for Cars, SUVs, Trucks (TR416S). ($6.5 USD). 

The TT MK1 180 has a 70mm air intake. (225 is 80mm).  Both require a 19mm plug for the crank case air hose.