Custom Integrated Vent Pod for 40mm Gauges - fits 02-08 Audi A4 (B6 & B7 Chassis) Custom Designed Vent-Mounted Pod for Boost Gauge Integration ONLY Compatible with 40mm Boost gauges Stealthy location - Maintains a clean look inside your cabin without attracting the attention of thieves or cops Safety - Some A-Pillars have integrated air bags - you do NOT want to install a gauge above an air bag Ideally located - You do not have to look away from the road to read the gauge