Obx ITB Set for cathedral ls engines. Awesome throttle response. Looks really cool too. All the hard parts are already done for you. Custom linkage for Dbc. Bottom tapped for vacuum manifold. Comes with vacuum manifold and GM IAC valve. Includes 30lb Bosch injectors. Injectors need o rings. It’s missing a screen but, the screens tended to come off anyway. I recommend getting better screens if you’re using them.