Home » VW MK4 Golf Polo GTI 1.8T Blow Off Valve Dual Port Aluminum BOV1001B

VW MK4 Golf Polo GTI 1.8T Blow Off Valve Dual Port Aluminum BOV1001B

SKU: 1005006952298284-black
Color
€44,35
-38% €70,97 €44,35

Enhance throttle response and turbo control with the Universal 25mm Dual Port Blow Off Valve (BOV-1001B). This compact aluminum valve is engineered to operate as both a blow-off and a recirculation valve, giving you the satisfying whistle of an atmospheric setup while maintaining engine-management reliability. Its universal 25mm fit makes it an ideal upgrade for VW MK4 Golf and Polo GTI 1.8T, and it also covers Saab Turbo variants and a wide range of other turbocharged engines that use a 25mm port.

Designed to reduce compressor surge and improve response during shifts, this BOV helps keep boost consistent and acceleration smooth. The dual-port design lets you tailor venting behavior to your preferences and local regulations—delivering a crisp whistle without upsetting the ECU when recirculation is required.

Compatibility is broad: 25mm fitments cover all VAG 1.8T engines (as found in Golf, Polo, Audi A3/S3/A4/TT, Passat, Seat Leon/Ibiza/Cupra, and more) and Saab Turbo applications. It may also fit other 25mm turbo systems such as Fiat Punto GT & Coupe, Porsche Bi Turbo units, Renault 5 GT Turbo, and similar setups. Always ensure your specific vehicle uses a 25mm port to maximize performance gains.

Benefits & Tips

  • Improve throttle response and reduce lag by quickly venting excess boost during shifts, helping you race to the next gear with less hesitation.
  • Enjoy a balanced sound profile—the valve provides audible blow-off while maintaining recirculation for ECU stability on engines that require it.
  • Installation tip: Verify the 25mm port matches your turbo’s intake piping and that Saab variants are compatible with your model before fitting.

Product specifications

  • Brand Name: NONE
  • Model Name: BOV-1001B
  • Type: Universal Turbo Diverter / Blow Off Valve, Dual Port
  • Port Size: 25.0mm (1\")
  • Horn Diameter: 34.8mm (1.35\")
  • Material: High Quality Aluminum Alloy
  • Color: Black
  • Weight: 219 g
  • Dimensions: Port 25.0mm; Horn 34.8mm
  • Application: All 25mm fitments including VAG 1.8T engines (Golf, Polo, Audi A3/S3/A4/TT, Passat, Seat Leon/Ibiza/Cupra, etc.), Saab Turbo variants (check before purchase), Fiat Punto GT & Coupe, Renault 5 GT Turbo, and other 25mm turbo systems
  • Certification: External Testing Certification ISO 9001
  • Origin: Mainland China
  • Special Features: Blow Off Valve

Package includes:

  • 1x 25mm Dual Dump Valve
  • 2x Flexible Pipe
  • 2x Nipples
  • 2x Clips

Warnings/Reminders

Check before purchase—Saab have an extremely high number of Turbo engines. Compatibility can vary across Saab variants, so confirm fitment with your specific model before installing.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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