GFB DV+ T9358 Diverter Valve – Mercedes M271 1.8T (C250 / SLK250)

The GFB DV+ T9358 is a direct bolt-on diverter valve upgrade for the Mercedes M271 1.8T engine (C250 & SLK250). It replaces the failure-prone factory diverter valve with a billet aluminum body and brass piston while retaining the OEM solenoid for perfect ECU integration — improving boost response and long-term reliability. Part number T9358.

Key Benefits

• Sharpened throttle response
• Faster boost recovery between shifts
• Eliminates common factory boost leaks
• Retains OEM solenoid for full ECU integration
• Billet aluminum + brass piston construction
• Direct bolt-on — no tuning required

Fitment Compatibility (U.S. Market)

Why Upgrade the Factory M271 Diverter Valve?

• The stock plastic valve is a known weak point that leaks boost under pressure.
• The DV+ replaces only the weak internal components with premium materials.
• Noticeably sharper throttle response and faster boost recovery.
• Reduces turbo flutter and compressor surge when lifting off the throttle.

Unlike cheap spacer-style solutions, the DV+ improves sealing and response without any ECU tuning or drivability changes.

What You'll Notice on the Road

• Crisper, more immediate throttle response
• Smoother and more consistent acceleration
• More stable boost pressure on stock or lightly tuned M271 builds
• Long-term reliability improvement over the factory valve

Technical Highlights

• Part Number: T9358
• Engine: Mercedes M271 1.8L Turbo
• Construction: Billet aluminum body + brass piston
• Install: Direct replacement — no modifications required