Forge Motorsport Alloy/Aluminium Throttle Body Charge/Boost Pipe + 50mm BOV Dump/Diverter Valve – BMW 135i 1 Series E81 E82 E87 E88 (E8x) N54 Twin Turbo – Hard Pipe Upgrade Kit FMBM335DV1

Forge Motorsport FMBM335DV1 Alloy Boost Pipe with 50 mm Dump Valve for BMW 1 Series E8x N54

Unlock smoother boost control and robust reliability on your 1 Series N54 with Forge Motorsport’s alloy throttle-side boost pipe paired to their giant 50 mm piston dump valve. This direct replacement pipework delivers rapid response and exceptional flow, making it a smart upgrade for enthusiasts who want dependable, high quality hardware on their E81, E82, E87 or E88 135 platform.

The heart of the kit is Forge’s largest displacement valve to date, using a 50 mm aluminium piston. It runs on heat stabilised Viton O-rings and high temperature grease to maximise service life and minimise wear. Thanks to its huge flow capability and low restriction design, operation is notably quiet while maintaining excellent performance.

Why drivers choose this setup

• Direct fit alloy boost pipe to the throttle housing on the N54 3.0 twin turbo engine
• Single 50 mm piston dump valve for fast, consistent boost control
• Aluminium piston construction with no diaphragm to split
• Viton O-rings and high temp lubrication for long term durability
• Low restriction design that flows hard and runs quiet
• Quality silicone joiners, clamps and fittings included for a clean install

We have fitted this kit for customers and on our own cars. Feedback is consistently positive for fit, finish and confident boost management.

Kit contents

• 1 x FMBM335DV1 Valve
• 1 x Alloy Throttle Body Hard Pipe
• 1 x Silicone Reducer
• 2 x Silicone Straight Blank Hoses 25 mm
• 2 x 30 mm Hose Clamps
• 1 x 80 mm Hose Clamp
• 1 x 90 mm Hose Clamp
• 2 x M6 x 12 Socket Cap Bolts
• 1 x M6 x 16 Socket Cap Bolt
• 1 x M6 Penny Washer
• 2 x M6 Plain Washers
• 1 x USB Instructions
• 1 x Forge Keyring, Bottle Opener and Sticker

Fitment

For BMW 1 Series 135 with the N54 twin turbo engine in E81, E82, E87 and E88 chassis.

Part number

FMBM335DV1

Tuning options

Want to tailor valve behaviour to your setup or boost levels? Forge spring tuning kits are available separately.

Note: due to the high flow and low restriction of the 50 mm valve, operation is quiet.

Installation and support

Professional installation available at MJ Modifications in Warwickshire. Request a fitting quote: info@mjmodifications.co.uk.

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