Turbosmart TS-0203-1222 Kompact Plumb Back BOV for 97-06 Audi A4/S3 1.8T 20V

Vehicle Fitment

• 1997-2006 Audi A4 (B5/B6, 1.8T 20V, FWD/AWD)
• 1999-2003 Audi S3 (8L, 1.8T 20V, AWD)

Features

• Full recirculating design maintains OEM-like quiet operation
• Improves turbocharger response and reduces compressor surge
• Direct replacement for factory BOSCH or DENSO bypass valves
• Constructed from billet aluminum for enhanced durability
• Green spring rated at -15 InHg pre-installed for optimal performance
• Compact size allows for easy installation in tight engine bays
• Sealed piston design ensures maintenance-free operation
• Compatible with vehicles using 25mm bypass valve fittings

Specifications

• Valve Type: Plumb Back (Full Recirculating)
• Fitting Size: 25mm
• Material: Billet Aluminum
• Spring Rating: -15 InHg (Green Spring, pre-installed)
• Compatibility: Replaces factory BOSCH or DENSO bypass valves
• Installation: Direct bolt-on for specified applications

Included Components

• 1x Kompact Plumb Back BOV (25mm)
• 2x Hose Clamps
• 1x Installation Manual

Product Description

The Turbosmart TS-0203-1222 Kompact Plumb Back Blow-Off Valve is engineered to enhance the performance and reliability of turbocharged vehicles. Designed as a direct replacement for factory BOSCH or DENSO bypass valves, this full recirculating BOV ensures that all excess boost pressure is redirected back into the intake system, maintaining MAF sensor accuracy and promoting smoother throttle response.

Constructed from high-quality billet aluminum, the valve offers superior durability over stock plastic units. The compact design allows for straightforward installation, even in confined engine bays. Pre-fitted with a green spring rated at -15 InHg, it delivers optimal performance for vehicles operating within standard boost ranges. This makes it an ideal upgrade for daily drivers seeking improved turbo efficiency without increased noise levels.

Note: Fitment confirmed for 1997-2006 Audi A4 (B5/B6) and 1999-2003 Audi S3 (8L) models equipped with the 1.8T 20V engine. Compatibility with other models or years has not been confirmed at this time.