Dual Port vents both to the atmosphere & back into the air intake. TS-0203-1069 More Interior Accessories spring loaded cylinder and pressure

spring loaded cylinder and pressure regulation provides up to 150 retarding horsepower throughout the engine's RPM range - not just at high rpm like some designs that use holes or additional parts and claim it as a better idea

Quality: No expense was spared when designing the Sealed7

giving you race-level lighting that transforms night into day

Retains factory valve behavior and on-board controls

Spring Rate Type: Linear

Dual Port vents both to the atmosphere & back into the air intake. TS-0203-1069 More Interior Accessories spring loaded cylinder and pressureDual Port vents both to the atmosphere & back into the air intake. Ports with sequential timing allow quieter operation during normal driving, while getting all the benefits of a vent to atmosphere BOV under race conditions.