That is bad ass sir. For years Ive been researching and wanting to twin charge an sr20 with a sc14 charger. I did not know they made one way valves for the intake though. Thats good to know, I was going to use multiple trottle bodies, opened by actuators once the turbo kicks past a psi beond the supercharge. A one way valve is alot better solution lol. Keep up the awsome work.