I bought 8 3/8" valves and installed four of them on my friends toyota. They never worked right from day one. They stuck all of the time. We returned them for airlifts and have had no problem since.
i guess thats why they were on sale. oh well u get what u pay for. ill buy e valves next time.
go with asco's.. 200psi daily and hoppin my s10 with 6 months without a stuck valve, weird valve or funny acting valve. oh and they're 3/8's.
get parker man!!! there almost twice the price.. but there well worth it..
like you said.. you get what you pay for..
i'm on my 2nd new set ans still having problems, They replaced my 1st set at their expence, nowe its me for it. I will buy a diff. brand next time.....