BOV Kompact EM PlumBack VR19

The BOV Kompact EM PlumBack VR19 from TURBOSMART USA is a compact blow-off valve engineered for turbocharged and supercharged vehicles seeking boost response refinement without sacrificing engine protection. Designed as a plumback-style recirculation valve, this unit routes pressurized air back into the intake manifold rather than venting to atmosphere, maintaining fuel mixture calibration and keeping your vehicle street-legal in emissions-sensitive jurisdictions. Whether you're running a modified daily driver or a precision-tuned performance build, this compact form factor integrates seamlessly into tight engine bays where traditional larger BOVs won't fit.

TURBOSMART's EM (electronic modulation) technology enables precise boost control by allowing fine-tuning of valve response through compatible engine management systems, eliminating boost spike and compressor surge that can damage turbos or induce unwanted turbo lag. The VR19 designation indicates this valve uses a 19mm poppet assembly, a proven platform that balances flow capacity with compact packaging in applications where space is at a premium. Weighing just 0.838 lbs and measuring 3.5 × 3.5 × 5 inches, the Kompact EM design sits well below the bulk of conventional BOVs, making installation straightforward even in chassis with engine bay restrictions or custom intake manifold configurations.

This valve suits tuners and enthusiasts running modern turbocharged platforms—particularly Subaru, Mitsubishi, and Ford EcoBoost variants—where boost accuracy and intake air stability directly impact fuel economy and transient response. Installation pairs with OEM or aftermarket intake piping, and the plumback configuration makes it ideal for street vehicles or track cars requiring environmental compliance. Verify your vehicle's boost threshold and intake manifold vacuum routing before purchase, as proper tuning ensures the electronic modulation delivers its intended anti-surge benefits without inducing hesitation or overboost scenarios.