BMW N54 turbo bypass valve pair for 1M, 135i, 335i, 535i

Unlock rock solid boost control on your twin turbo N54 with this precision engineered bypass valve set from Forge Motorsport. Designed as a direct swap for the fragile factory diaphragm units, this piston driven solution gives clean recirculation, sharper throttle transitions and dependable sealing on stock and tuned cars. Perfect for daily driving, spirited road use and track days.

Part number: FMDVBM35

Built for reliable boost control

• CNC machined T6-6061 billet alloy bodies for strength and longevity
• Piston internals based on the proven 007P architecture for fast actuation and consistent sealing
• Viton high temperature O-rings for leak free performance under sustained heat
• Lubricated with Mobil 1 fully synthetic bearing grease for smooth operation
• Direct replacement using BMW’s OEM style quick connect fittings with no permanent modification
• Recirculating design maintains MAF and ECU calibration with no fault lights

Tuning ready control

Tailor valve behaviour to your boost level with interchangeable springs while retaining full piston travel and flow. Supplied with uprated yellow springs, and compatible with further spring options to suit everything from factory calibration to Stage 1 and Stage 2 software.

Engineered hoses and clamps

• Multi layer, fabric reinforced silicone hoses compatible with the stock airbox and charge piping
• Quality hose clamps with bevelled edges and pressed in drives engineered for silicone use

Real world results that inspire confidence

We have fitted this kit to our own N54 cars and many customer vehicles. Feedback has been consistently positive for boost stability, response and long term reliability. If you are chasing a preventative fix for tired factory valves or building a higher boost setup, this is the dependable hardware you want on your twin turbo BMW.

Vehicle compatibility

• BMW 1M Coupe with N54
• BMW 135i N54 (E82)
• BMW 335i N54 (E90 E91 E92 E93)
• BMW 535i N54 (E60)

Direct swap for the OEM Bosch style units on N54 engines. Suitable for cars with stock or upgraded intakes, exhausts and ECU remaps.

Key benefits

• Eliminates common diaphragm failures and boost leaks
• Improves throttle lift off control and reduces compressor surge
• Consistent boost holding on remapped engines
• Straightforward installation with no cutting

What you receive

• 2 x FMDVBM35 valves, left and right
• 1 x 25 mm x 400 mm Mega Flex hose
• 1 x 25 mm x 330 mm Mega Flex hose
• 4 x 40 mm hose clamps
• 2 x uprated yellow springs
• 1 x Forge sticker

Professional fitting

Want it installed correctly first time. Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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