GOT A SINGLE PISTON BAILEYS VENTURI DUMP VALVE ON AT THE MOMENT AND I FANCY A CHANGE. TRIED A MATES FORGE TWIN PISTON AND IT WORKED FINE. BOUGHT A GGR GRP A TODAY AND IT DOESNT WORK LOL. (WHICH I THINK IS A DIAPHRAM TYPE)

WHAT SORT OF SPEC DUMP VALVE DO I NEED?

HAS I JUST GOTTA BE A PISTON TYPE OR IS THERE ANY THING ELSE IT NEEDS TO DO. I WAS THINKING OF THIS WOULD IT WORK?

http://www.forgemotorsport.co.uk/co...roduct=FMDV004A

MANY THANKS FOR ANY HELP