E-VAC Scavenger kits are dyno proven to pull up to 3" of vacuum from race motors, improving horsepower and reducing crankcase pressure. 2x E-VAC Scavenger Kit and fitting. Each kit includes a Male E-VAC fitting (which features an integrated Male 10-AN bung for major cost savings), an M18 angled O2 bung and an M18 x 1.5 male threaded plug.