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

The GFB DV+ T9358 is the premier diverter valve upgrade for the Mercedes M271 1.8T engine found in the C250 and SLK250. It directly replaces the failure-prone factory diverter valve with a high-performance billet aluminum body and brass piston, dramatically improving boost response and long-term reliability.

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

M271 Platform Compatibility

Fits all U.S.-market M271-equipped C250 and SLK250 models listed above.

Why Upgrade the Factory M271 Diverter Valve?

• The stock plastic valve is a known weak point that leaks boost under pressure
• GFB 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

Upgrade your Mercedes M271 with the GFB DV+ T9358 for sharper response, reliable boost, and long-term durability on the C250 and SLK250.