TORQUE MONSTER

Do I really need check valves if i'm only runnning 9 psi on a b20 motor..
and if so how do i do this

thanks

jspek29

yea if you dont your engine light will come on, from what i heard it looks kinda crappy if u use check valves, go ahead and spend a little more money and buy a missing link , they look a lot cleaner, i bought mine from ebay for about 50 bucks, should be here about a week . how to install it not really sure i now goes somewhere between you map sensor.