Silver High Flow Washable/Reusable Drop-In Panel Air Filter For 12-16 S550 4.7L 57-1391-BLK the BOV vents boost in

the BOV vents boost in the intake tract to atmosphere to relieve the pressure

Whatever you're driving

HPS 2-1/4" (57mm)

HPS 5/32" High Temp Blue Silicone vacuum tubing hose is commonly use for vacuum advance systems

Silver High Flow Washable/Reusable Drop-In Panel Air Filter For 12-16 S550 4.7L 57-1391-BLK the BOV vents boost inOur reusable Drop in Filter is designed to be the last air filter you buy for the car. It can be cleaned, reused, and provides exceptional filtration for your engine. It fits in your stock air box and replaces the factory filter. Performance is increased as the cotton gauze media filters but does not impede air flow. These filters do not require oil so it does not clog your MAF sensor throwing a CEL.