i need a 3way way air pressure valve that i can just turn a switch or hit a button and go from 1 pressure source to another. got an idea for a slick set-up for turbo motors and i wanted to build it and try it out, see wtf it'll do. basically i'm looking to be able to smash a nos button on the wheel and go from a low boost setting to a high boost setting, but need the valve to make it happen, already figured out how to plumb it. any ideas out there? we're using 1/4 air line(the pvc black type). thought maybe there was a valve for airbags that might work but i'm not finding anything.