Go Fast Bits T9488 VTA Blow-Off Valve for 12-26 Mercedes A/B/C/CLA/GLA/GLC Turbo

Vehicle Fitment

• 2009-2016 Mercedes E-Class (W212 E200/E250, 1.8L-2.0L Turbo I4)
• 2011-2021 Mercedes C-Class (W204/W205 C180/C200/C250/C300, 1.6L-2.0L Turbo I4)
• 2011-2016 Mercedes SLK-Class (R172 SLK200/SLK250, 1.8L Turbo I4)
• 2011-2019 Mercedes B-Class (W246 B180/B200/B220/B250, 1.6L-2.0L Turbo I4)
• 2012-2018 Mercedes A-Class (W176 A180/A200/A250, 1.6L-2.0L Turbo I4)
• 2013-2019 Mercedes CLA-Class (C117 CLA180/CLA200/CLA220/CLA250, 1.6L-2.0L Turbo I4)
• 2014-2019 Mercedes GLA-Class (X156 GLA180/GLA200/GLA220/GLA250, 1.6L-2.0L Turbo I4)
• 2015-2025 Mercedes GLC-Class (X253 GLC200/GLC250/GLC300, 2.0L Turbo I4)
• 2019-2025 Mercedes GLC-Class (X253 GLC43 AMG, 3.0L Bi-Turbo V6, two valves recommended)
• 2018-2025 Mercedes GLC-Class (X253 GLC63/GLC63 S AMG, 4.0L Bi-Turbo V8, two valves required)
• 2016-2019 Mercedes E-Class (W213 E200/E250/E300, 2.0L Turbo I4)
• 2018-2025 Mercedes E-Class (W213 E63/E63 S AMG, 4.0L Bi-Turbo V8, two valves required)
• 2016-2021 Mercedes C-Class (W205 C63/C63 S AMG, 4.0L Bi-Turbo V8, two valves required)
• 2018-2025 Mercedes A-Class (W177 A160/A180/A200/A250e, 1.3L Turbo I4/Hybrid)
• 2018-2025 Mercedes B-Class (W247 B160/B180/B200/B250e, 1.3L Turbo I4/Hybrid)
• 2019-2025 Mercedes CLA-Class (C118 CLA180/CLA200/CLA250e, 1.3L Turbo I4/Hybrid)
• 2020-2025 Mercedes CLA-Class (C118 CLA35 AMG, 2.0L Turbo I4)
• 2018-2025 Mercedes GLB-Class (X247 GLB180/GLB200, 1.3L/2.0L Turbo I4)
• 2018-2025 Mercedes G-Class (W463A G63 AMG, 4.0L Bi-Turbo V8, two valves required)
• 2019-2025 Mercedes AMG GT (C190/R190 AMG GT, 4.0L Bi-Turbo V8, two valves required)
• 2020-2025 MG MG5 (MG5 1.5T, 1.5L Turbo I4)

Fitment Notes

• Designed for turbocharged petrol engines using the OEM electronic diverter valve.
• Not compatible with Kompressor, diesel or naturally aspirated engines.
• Twin-turbo AMG models require two valves (one per turbo) for proper operation.
• Direct bolt-on using the factory diverter mounting pattern.

Features

• VTA design vents to atmosphere for a sharp, aggressive blow-off sound under boost.
• Integrated low-profile solenoid for true plug-and-play installation in the factory diverter location.
• Derived from GFB DV+ architecture for improved boost holding and faster throttle response.
• All-metal construction replaces factory plastic diverter components to reduce flex and boost leaks.
• Pilot-actuated piston design opens progressively to maintain stable boost and drivability.
• Engineered to handle boost pressures of up to approximately 50 psi for tuned applications.
• Retention of factory ECU control strategy to avoid fault codes and drivability issues.
• Compact body clears common aftermarket turbo inlets and intake piping on supported platforms.
• Serviceable internal components for long-term reliability on street or track builds.

Specifications

• Valve type: Vent-to-atmosphere blow-off valve with integrated electronic solenoid.
• Compatibility: Factory electronic diverter valve location on listed Mercedes/MG turbo petrol engines.
• Boost capacity: Rated for high-boost applications up to ~50 psi (proper supporting mods required).
• Material: Precision-machined metal body and piston with high-temperature VITON-style seal.
• Operation: Pilot-actuated piston, ECU-controlled via OEM-style electrical connector and adaptor loom.
• Position: Turbocharger compressor outlet / charge pipe diverter location (engine bay).
• Configuration: Direct bolt-on to OEM housing pattern; no external vacuum lines required.
• Maintenance: Pre-lubricated piston; no regular lubrication required under normal use.

Included Components

• 1x GFB T9488 VTA blow-off valve assembly with integrated solenoid
• 3x Socket head mounting screws
• 1x Adaptor loom for plug-and-play connection to the factory harness

Product Description

The GFB T9488 VTA blow-off valve is a direct-fit upgrade for a wide range of late-model Mercedes-Benz turbo petrol engines (and the MG5 1.5T), replacing the factory electronic diverter valve with a high-performance, atmosphere-venting solution. By combining the proven internal design of the GFB DV+ with a vent-to-atmosphere outlet and integrated solenoid, it delivers a crisp, audible blow-off sound while retaining full ECU control and everyday drivability.

Compared to the stock plastic diverter assembly, the T9488's all-metal construction and pilot-actuated piston design offer superior boost sealing, improved throttle response, and more consistent performance at higher boost levels--especially on tuned AMG and 2.0T/1.3T platforms. Installation is fully bolt-on in the OEM diverter location using the supplied adaptor loom and hardware, with no additional pipes or fabrication required. It is ideal for enthusiasts who want both sound and performance from their turbo Mercedes, while maintaining OEM-like integration and reliability.