The APR Mechanical Boost Gauge System comes complete with a mechanical gauge in red or blue, with a vent mounted pod for a clean install. Included with the system is all necessary hardware to install, including a harness that eliminates the need to splice into your factory wiring harness. Fits Volkswagen Golf 15-21, Golf Alltrack 17-19, Golf R 15-19, Golf SportWagen 15-19, GTI 15-21