Cobb 15-18 Subaru WRX / 14-18 FXT LF By-Pass Valve

The C.A.R.B. Certified COBB LF BPV is a compact and lightweight bypass valve capable of holding very high boost pressure without leaking. Its updated design reduces control volume by 30% for extremely fast boost venting. Innovative engineering and precision manufacturing result in a compact package designed for tight engine bays. Due to the low weight of components, the LF BPV's moving parts have less inertia, allowing faster response than heavier components in other bypass valves. This updated design features a Banjo-fitting vacuum port for 360-degree adjustability of hose routing, simplifying installation and reducing potential leak points compared to NPT ports. This new design also includes a piston o-ring seal twice the diameter of the old design, providing more seal compression and reduced wear. Adjustability of the spring seat is no longer needed due to the updated spring and seal design, which provides a 60% increase in clamping force at peak boost while maintaining similar operation at idle and transient loads.