as far as I know the valve for AC systems are an industry wide standard. The old R12 system was a bit bigger. I have a vacume pump for charging R134 AC systems and it only came with one size to screw into all systems. I have used it on VW, Ford, Chevy. All the same size. I do not even know if it is the high side that is bigger to the low pressure side off the top of my head. One fits the high side and one fits the low side. So the valve you get should be the right one as long as you do not get a set for the old R12 system.