Designed for racing applications that experience extreme vibration or violent pounding such as Baja or other off-road applications The bourdon tube gauge mechanism is encased in a special dampening fluid to provide super smooth pointer movement for any style of auto racing. 270deg in.full sweepin. dial design for enhanced visibility. Requires braided stainless steel line to connect the isolator to the fuel source. May be installed inside vehicle by mounting isolator in engine compartment.