i am selling a forge motorsport dump valve on ebay, a guy has asked me if it will fit an rst, if my memorys correct do the rst have to have a twin piston dump valve and are ones specced for a cosworth twin piston? dont really wanna strip it u see. any help appriciated as i wanna be honest with him. cheers guys

 

i have had 2 forge motorsports dump valves on 2 seperate rs turbos and it runs fine it has to have a twin piston setup to work correctly on a rs turbo