Brake Servo & Master Cylinder Upgrade

The brake servo and master cylinder on the Golf Mk1 are small. 

Like me, most people upgrade the servo to one for the Golf 1Mk2 16v for a better feel, but even this leaves you wanting better brakes, especially if you have gone 4 pots with the Golf Mk2 16v rear disc conversion.  Upgrading the master cylinder to a bigger one will sort out the pedal travel and firmness. 

The T4 22.2mm Brake Master Cylinder - Part No. 357 611 019B or the T4 - 25.4mm - Part No. 7D0611019A  is ideal for brake upgrade on MK1 & MK2 Golfs when using a 9" servo. This master cylinder will work with all MK2 Golf 16v, Corrado, Passat B3/4 MK3 Golf Servos. 

The 25.4mm is perfect for 4-pot callipers and will stop the car from feeling over-braked with too little pedal movement and locking up when provoked. I chose this option as I could easily lock up the 4-pot HiSpec brakes on the fronts with a panicked stomp on the brakes. 

As the servo is bigger and the master cylinder is longer, it takes up more room, but it still just fits. The brake fluid sensor cable could be just a few centimetres longer to make it a perfect fit.