This is a new Brass Proportioning Valve for a 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 Jeep CJ XJ YJ Wrangler and Cherokee with non-ABS disc brakes in front and drum brakes in rear. This long lasting heavy duty brass disc / drum combination proportioning valve performs all the necessary functions when using disc brakes in the front and drum brakes in the rear and is a perfect upgrade over the original.