Vortech Maxflow Bypass/Blow-off Valves improve supercharger operations by opening to relieve unwanted pressure during deceleration. This reduces heat build-up and eliminates compressor surge. These units feature a “rolling diaphragm” design which provides ultra-quick valve response along with unmatched durability. Listed here from smallest to largest, Vortech offers a Maxflow Bypass/Blow-off Valve for virtually any requirement or application.

Standard Bypass Valve

Specifically designed for street applications. Eliminates compressor surge and reduces heat soak in the discharge tube. Recommended for vehicles running 6 to 10 PSIG. Both inlet and outlet mate to a 1″ hose.

Maxflow Race Bypass Valve

Our Maxflow Racing Bypass Valve flows 320 CFM @ 8PSIG and features a compact design that is ideal for applications with tight engine compartments. Available with Black Anodized tops and either satin or polished finish housings, they are both functional and stylish. These units will retrofit to standard HKS/Greddy style mounting pads and outperforms anything its size. Bypass valve is preset to open at three to four inches of vacuum. Installation gasket is included. The outlet mates to a 1.75″ hose. Weld-on flange required for some applications, sold separately.

Maxflow Race BOV Valve

Our Maxflow Racing Blowoff Valve (BOV) flows 320 CFM @ 8PSIG and features a compact design that is ideal for applications with tight engine compartments. These valves are equally capable as the Race Bypass Valve, but the 360° discharge from the Race BOV gives them a distinctive and louder "blowoff" sound. These functional and stylish valves are available with Black or Clear Anodized finish, and will retrofit to standard HKS/Greddy style mounting pads while outperforming anything its size. Race Blowoff Valve are preset to open at three to four inches of vacuum. Installation gasket is included. Weld-on flange required for some applications, sold separately.

Maxflow Mondo Bypass Valve

High-flow Mondo Valves (550+ CFM @ 10PSIG) are recommended for applications creating more than 12 PSIG and are mandatory for any system using a cog drive belt. Available in two different finishes - Satin with a Black Top or All Polished Finishes, these units can be adaptable to all types of supercharged and turbocharged installations, mounted at any angle. The outlet mates to a 2″ hose. Other features include anodized aluminum valve head with O-ring seal, a shaft configuration that allows valve head articulation for perfect sealing, and an improved dual vent design. A large signal hose connection provides for fast valve action. An installation gasket is included. Weld-on flange required for some applications, sold separately.

Maxflow BV57 Bypass Valve

The billet aluminum BV57 Bypass Valve flows an amazing 1,300 CFM @ 10PSIG. It features a large rolling diaphragm configuration with –4 AN signal hose connection and dual filtered vents that allow for quick valve response. The valve head attachment method provides valve articulation for perfect sealing to the mechanically retained valve seal. It also features adjustable spring preload and reconfigurable signal input locations. It can be mounted in any position and is adaptable to all types of boosted engine installations. This valve is designed for use in speed density or "blow-through" Mass Air configured applications only (no re-circulation). Assembly includes V-band mounting clamp and sealing O-ring. Requires mounting flange upon initial installation (sold separately).