Recommended to be used on all dirt late models! Line locks are not designed to be kept in the ON position continuously and can overheat and fail if used as a shut-off. Line locks can also trap pressure in the brake system and cause the brakes to drag. Wilwood's shut-off valve can be engaged without trapping pressure in caliper (will not drag brakes). Wilwood's purpose-built and designed shut-off valve uses much less power and runs much cooler than line lock valves.