The Process West Plenum of the BA/BF Falcon is CNC Machined to precision from solid billets of 5083 aluminium plate. Billet aluminium is super strong and holds enormous amounts of pressure, nothing but the best for Process West. To promote perfect air flow into the cylinder head each runner entry has a blended bell-mouth. The plenum is supplied with a plug-in throttle body extension wiring loom to allow for installation with no wire cutting, as well as teh option for custom cover plates.