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PR104C Hold Off Valve - GM1970 GM F-body Camaro / Firebird / Trans Am, X-body Nova
GM Valve Notes: This item is an exact reproduction
disc brake hold off valve. This valve was used to hold off pressure to the rear
brakes so the front brakes would go on a split second before. This was also
considered a correction valve for the 1970 model year. During extreme braking
conditions, this valve prevented the car from getting sideways and evened out
braking loads. This valve is located right below the master cylinder beside the distribution
block. In 1970, these cars had three valves that made up the disc brake system.
The valves include: above hold off valve, distribution block, and round gold
ball valve. In 1971, these three pieces were combined into one valve which
simplified the system. |