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. During extreme braking conditions, this valve prevented the car from getting sideways and evened out braking loads. This valve is located below the drivers side door and makes the front to rear brake line 2 pieces. This valve is on all disc brake cars and big block applications.
This item is an exact reproduction featuring a brass body, the correct bracket, phosphate plating and working insides. You will also find with current manufacturing procedures, the reproduction has no tool stamping marks and the edges of the part are much cleaner than the original.