Will this fit our fuel system hardline? I want to go from the fuel hardline to a -6 AN fitting on a 2000 Miata. Although there are a bazillion different style EFI quick disconnect fittings there seems to be only one style of hardline, albeit in different sizes.

http://www.summitracing.com/parts/RUS-640863/

 

I don't believe our cars use a spring lock connector at the fuel rail. I'm trying unsuccessfully to picture it.

 

The fuel rail on a 99/2000 is a spring loaded quick disconnect. Not sure about other model years; and yes, the Russell adaptor fits. Just be sure to get 5/16" and not 3/8".