It is a valve connected to the bottle that has a tube vented to the outside of the car. If the pressure gets to high, it will release the pressure and vent it to outside of the car. Some tracks require it to run, although it may only be on cars were the bottle is mounted in the drivers compartment. Not sure of the exact rule.
Speed kills, but it beats going slow!
Simon Langley
Black 98 SVT EO (#2119 of 6535)
269.3 FWHP, 195.4 TQ
14.123 @ 97.36
All go, and no show!
Vortech, Quaife, Driveshaft Shop Stage II axles, Magnecore Wires, Custom True Dual Exhaust.
CDW-27 1/4 Mile Registry
