Blow Off Valve for Ford Focus ST Billet Aluminum High Flow Atmospheric Performance

Upgrade your Ford Focus ST with the Ford Focus ST Atmospheric Blow Off Valve Aluminum, High Flow Performance by VOLM. Built from billet aluminum, this high‑flow blow off valve (BOV) is designed to handle the demanding airflow of performance setups while delivering a satisfying audible “Whoosh” every time you lift off the throttle. It’s a practical upgrade for drivers who want crisper throttle response and a more secure boost during aggressive driving.

Designed to vent excess boost efficiently, this BOV improves throttle response by venting to the atmosphere rather than recirculating. The result: quicker turbo surge recovery, more immediate engine response, and a noticeable improvement in how the car reconnects with each gear change. The valve uses counter-balanced springs and dual pistons to prevent leaks, delivering reliable boost control even under high‑frequency boost cycles. ISO9000 external testing certification confirms its quality and consistency for daily driving or track use.

Compatibility is straightforward: it’s suitable for the Ford Focus ST225 and for Ford S‑Max 2.5 Petrol (Gen 1, 2006–2014). The kit is engineered for a 4‑cylinder installation, delivering a durable and precise performance upgrade without complicated modification.

Included in the build are thoughtful components to get you running quickly and reliably, with robust fitment and secure connections designed for road use and occasional track days.

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Benefits & Tips

• Experience a distinctive audible “Whoosh” when you lift off the throttle, signaling faster boost release and a more responsive throttle overall.
• Improved throttle response helps during quick gear changes and spirited driving, making your turbocharged setup feel more lively on the street or track.
• Use with Ford Focus ST225 or Ford S-Max 2.5 Petrol Gen 1 vehicles to achieve consistent boost control and reduce the chance of boost spikes during aggressive driving.

Product specifications

• Brand Name: VOLM
• Model Name: BOV1189
• Item Type: Turbo
• Material: Billet aluminium
• Special Features: Blow off valve atmospheric
• No. of Cylinders: 4 Cylinder
• External Testing Certification: ISO9000
• Origin: Mainland China
• Compatibility: For Ford Focus ST225; For Ford S-Max 2.5 Petrol (Gen 1 2006-2014)
• OEM NO.: /
• Year: /

Package includes:

• 1x Blow off valve
• 1x Silicone hose
• 2x clamp
• 1x T piece

Warnings / Reminders

• Compatibility is indicated for Ford Focus ST225 and Ford S-Max 2.5 Petrol Gen 1 (2006–2014).
• Professional installation is recommended to ensure proper fitment and secure hose/clamp connections.