GFB DV+ Direct-Fit Performance Diverter Valve for BMW 6 Series Gran Coupe F06 640i 3.0 N55 (2011-2018) 320hp - Turbo Recirculation/Dump Valve Replacement

OEM+ Turbo Bypass Upgrade for BMW 640i F06 N55 3.0 TwinPower Turbo 2011 to 2018

Transform throttle feel and protect your boost with this DV+ upgrade for the BMW 6 Series Gran Coupe F06 640i. It replaces the weak factory pressure relief unit with a robust, ECU-compatible solution that keeps everything smooth and refined while delivering sharper response and stronger boost retention. Ideal for daily use, perfect for tuned maps or completely standard cars, and it keeps the discreet OEM sound with zero unwanted whoosh.

What it does for your N55

• Quicker spool and crisper pedal response for a more connected drive
• Faster boost recovery between gear changes for harder in-gear pull
• Addresses common boost bleed issues from the stock charge-air valve
• Durable, performance-led design with long-term reliability in mind
• Plug-and-play fitment that works with the factory control strategy
• No remap required, no extra noise, just consistent turbo performance

Why enthusiasts choose this kit

Our workshop has fitted and used these across multiple N55 builds. Customers consistently report a tighter, more responsive feel, cleaner shifts and a noticeable improvement in drivability. If you want OEM refinement with genuine gains in boost control, this is a standout upgrade.

Vehicle compatibility

BMW 6 Series Gran Coupe F06 640i 3.0 petrol turbo, 320 hp, N55 engine, model years 2011, 2012, 2013, 2014, 2015, 2016, 2017 and 2018.

Perfect for

• Stage 1 and Stage 2 calibrations seeking reliable boost management
• Stock vehicles wanting an OEM+ improvement without extra sound
• Drivers chasing a simple, effective fix for turbo surge or flutter

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk. We are happy to help with product selection and installation advice.

Search-friendly terms customers use

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Order with confidence for a refined, responsive and reliable boost control solution that feels factory, performs like a true upgrade and keeps your N55 delivering consistent power.