Home » Performance Aluminum Blow Off Valve For Ford Focus ST Mk2 Mk3

Performance Aluminum Blow Off Valve For Ford Focus ST Mk2 Mk3

SKU: 1005012874319266-Default Title
Default Title
€35,48
-38% €56,77 €35,48

This billet aluminium blow off valve replaces the factory diaphragm unit on the Ford Focus ST Mk2 and Mk3 to deliver faster turbo recovery, consistent boost retention, and a distinct exhaust flare on throttle lift. The reinforced piston mechanism eliminates the premature wear common with OEM rubber seals, providing a longer lifespan under increased manifold pressure. When paired with supporting intake or ECU modifications, the valve’s serviceable internals allow you to swap preload springs to match your desired activation threshold, keeping boost spikes predictable and drivability smooth across low RPM cruising and aggressive wide-open throttle runs.

Performance Benefits & Setup Tips

  • Install the included fast road tuning springs to set an earlier opening point that matches mild to moderate boost stages.
  • Wipe the flange mating surface clean and inspect the rubber seat before bolting the valve to prevent unmeasured air leaks that trigger fault codes.
  • Run a post-installation dyno or log file to confirm fuel trims stabilize once the system adapts to the adjusted backpressure.

Technical Specifications

  • Materialexit: Machined billet aluminium construction with corrosion-resistant finish
  • Type: Piston-style atmospheric dump valve, direct OE replacement fitment
  • Compatibility: Ford Focus ST Mk2 (225 hp), Ford Focus ST Mk3 (250 hp)
  • Maintenance: Fully serviceable internal components for routine cleaning or spring swaps
Package includes: 1 × aluminium blow off valve, 2 × fast road tuning springs, 1 × replacement O-ring seal

Installation Notice: Professional fitting is strongly recommended. This product is supplied without assembly manuals, and improper torque or cross-threading can compromise the vacuum seal. Always verify pipe alignment, double-check hose clamps, and conduct a leak test before normal operation.

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