Here is a simple yet effective install that was just finished on a Mk5 VW GTI.
The components used was Airlift Autopilot controller and management as well as their manifolds and front Bag and strut combination. The Rear is sitting on Slam specialties Re-5's and Dorbritz Designs D-cups with Airlift rear shocks. The compressors are dual Viair 380c and an 5 gallon Accuair tank. Air is supplied with 3/8's line to the front and 1/4' to the rear.