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Forge Motorsport Alloy Charge/Boost Hard Pipe for BMW N55 335i & 435i (F30 F31 F33 F34) | Turbo Outlet & Throttle Body Charge Air Pipe | Direct Fit, Meth Bung, OEM DV Compatible | 3 Series & 4 Series | Replaces 13717604033

Forge Motorsport Alloy Charge/Boost Hard Pipe for BMW N55 335i & 435i (F30 F31 F33 F34) | Turbo Outlet & Throttle Body Charge Air Pipe | Direct Fit, Meth Bung, OEM DV Compatible | 3 Series & 4 Series | Replaces 13717604033

£333.03
£333.03
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

Alloy Boost Pipe Upgrade for BMW 3 Series and 4 Series with the N55 engine

Replace the fragile factory plastic pressure tube on your F-series N55 and enjoy dependable boost control and sharper pedal response. The moulded OE duct is a well-known weak link that can split around the throttle connection under load, leading to boost leaks and limp mode. This Forge Motorsport aluminium hard pipe is a robust, direct replacement designed for long-term reliability and consistent performance on both standard and tuned cars.

We run this hardware on our own N55 builds and it has been a rock solid solution. Customers report a crisper feel, faster spool and steady boost pressure, especially on remapped setups and spirited driving. It is a simple, worthwhile upgrade that eliminates a common headache and adds confidence every time you press the throttle.

Key benefits

  • Direct replacement boost tube for F30 F31 F33 F34 N55 models that removes the common plastic failure point
  • CNC machined adapters and flanges for a precise, leak free seal at the throttle body
  • Integrated water methanol injection boss supplied with a blanking plug if unused
  • Retains the factory O ring throttle connection for OE style fit
  • Works with the stock electronic recirculation valve for seamless integration
  • Tough powder coated finish for a clean OEM plus look
  • Improved response and reduced lag thanks to secure, efficient turbo pipework

Why switch to an alloy hard pipe

The N55 plastic turbo outlet pipe commonly fatigues at the coupler. Forge Motorsport’s aluminium boost tube eliminates that weak spot with durable construction and high quality machining that stands up to repeated heat cycles and higher boost pressure. Fit it once and drive with confidence.

Compatibility

  • BMW 335i N55 F30, F31, F34
  • BMW 435i N55 F33

OEM reference for guidance: 13717604033. If you would like us to confirm against your VIN, contact our team before ordering.

Fitting and support

For professional installation, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and friendly advice on complementary upgrades such as intercoolers and intake hardware.

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