boost gauge is T'd off the cruise control vac. source in the back of the intake manifold. BOV T'd off the fuel pressure regulator. and the wastegate is T'd off the charcoal canister hose. see the link i put pics where i hooked up the wastegate. you can T the BOV and the boost gauge off the PCV valve hose too, that'll work also-i didn't do this cause i hadn't thought about it when i did the install, and also i had a vacuum source behind the intake manifold(cruise control vac. source)which was close to where the boost gauge line came outta the firewall.