Forge Motorsport BMW N55 Charge/Boost Pipe Upgrade - Alloy Intercooler/Throttle Body Hard Pipe for M2 F87, M135i F20/F21, M235i F22/F23 - Turbo Outlet/Charge Air Tube - Replaces OE 13717604033 - Direct Fit - FMBP135F20

Forge Alloy Boost Pipe for BMW N55 – Strong, reliable and tuned-car ready

Eliminate the fragile factory plastic pressure tube and enjoy crisp throttle response and rock-solid boost control with this Forge uprated hard pipe for the BMW N55 3.0 turbo engine. Engineered as a direct swap for the OE hose, it is a proven fix for split pipes, blown couplers and limp mode on spirited drives or remapped cars. Part number: FMBP135F20. Replaces OE reference 13717604033.

Why this upgrade makes such a difference

The stock charge air tube on N55 models is a known weak point, especially on tuned vehicles where boost pressure is higher. Forge’s aluminium boost tube uses precision CNC-machined ends for an OE-style latch at the throttle body, delivering a secure, leak-free connection that will not crack or pop off under load. Expect sharper pedal response, stable boost, and long-term reliability.

Highlights

• Alloy hard pipe resists heat, pressure and ageing for dependable performance on road and track.
• CNC-machined throttle connection retains the factory O-ring and locking design for a perfect seal.
• Improved airflow characteristics help reduce lag and sharpen response on the N55 turbo motor.
• Pre-threaded methanol injection port with supplied blanking plug for easy future WMI add-ons.
• Works with the standard electronic diverter valve and original hardware.
• Tough powdercoat finish looks OEM-plus and protects against corrosion.
• Direct replacement for OE pipe 13717604033 with no cutting or custom fabrication.

Vehicle fitment

• BMW M2 F87 2014+
• BMW M135i F20 and F21 2012+
• BMW M235i F22 and F23 2014+

Please note: Not suitable for XI xDrive variants. For xDrive applications, or for F30/F31 335i and F32/F33/F36 435i models, a different N55 pipework solution is required. Contact us for guidance.

Real-world feedback

We have installed this Forge boost tube on our own cars and many customer vehicles. The consensus is clear: cleaner spool, consistent boost, and no more worries about the brittle factory plastic pipe. It is a fit-and-forget reliability upgrade that supports stock, Stage 1 and Stage 2 calibrations.

Fitting and support

Designed as a straight swap using OE-style connections. For professional installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Manufacturer and warranty

Manufactured by Forge Motorsport with a lifetime warranty for the original purchaser.

Cross-references and identifiers

• Forge part number: FMBP135F20
• Replaces BMW part: 13717604033

Search-friendly terms

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