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Fuel-It

Fuel-It BMW N54/N55 Stage 1 LPFP Inline Low Pressure Fuel Pump Upgrade Kit for 1M, 135i, 335i (E82/E88/E90/E92/E93, X1 E84) - Walbro GSL392 - E85 Compatible

Fuel-It BMW N54/N55 Stage 1 LPFP Inline Low Pressure Fuel Pump Upgrade Kit for 1M, 135i, 335i (E82/E88/E90/E92/E93, X1 E84) - Walbro GSL392 - E85 Compatible

£210.37
£247.49 £210.37
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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.

High-flow low side fuelling for BMW N54 and N55 turbo models

Keep your remapped BMW supplied with consistent petrol under boost with this inline auxiliary fuel pump kit. It runs in-line with the original in-tank unit to increase low side capacity by approximately 50 percent when paired with a healthy factory pump. Fully assembled and ready to fit, it uses the proven Walbro GSL392 and ethanol-safe hardware for dependable performance on pump fuel or E85 blends.

Perfect for fast-road and trackday builds, this upgrade gives your twin-turbo straight-six the headroom it needs for stable low side pressure, cleaner pulls and greater reliability on tuned cars. In real-world setups it supports roughly 300 to 500 wheel horsepower when the OE lift pump is in good condition.

We run this setup on our own cars and have fitted it for many customers. Feedback has been consistently excellent for drivability, reliability and value.

Key reasons enthusiasts choose this kit

  • Inline low side solution that retains your original in-tank unit for OEM-like refinement
  • About 50 percent more flow when combined with the stock pump for stronger fuel supply under load
  • Pre-built assembly with Walbro GSL392 and ethanol compatible components for simple installation
  • Supports circa 300 to 500 whp on petrol with a healthy OE lift pump
  • Ideal for tuned BMW 1M, 135i and 335i owners seeking a dependable fuelling upgrade

What you receive

  • SAE J30R10 E85-safe hose
  • 14 gauge fuel-resistant wiring harness
  • Female bullet quick-connects x2
  • Vent tube replacement clip
  • Nylon cable ties x10
  • Stainless lock nuts x2
  • 10 ga to 14 ga step-down butt splices with ethanol-safe heatshrink x2
  • Push-lock pump retention fittings x2
  • 14 ga butt connectors with heatshrink for easy removal if returning to stock x2

Vehicle fitment

For BMW E-chassis models with the N54 or N55 engine, including:

  • 1 Series E82 Coupe and E88 Convertible
  • 3 Series E90 Saloon, E91 Touring, E92 Coupe, E93 Convertible
  • X1 E84

Models such as the 1M, 135i and 335i are all supported.

Fitting and support

Supplied fully assembled for an uncomplicated install alongside the factory pump. A healthy OE unit is required for best results. Professional fitting is recommended.

Want it installed by experts. MJ Modifications in Warwickshire offer fitting services. Request a quote at info@mjmodifications.co.uk.

Pre-dispatch compatibility check

To guarantee correct fitment we can verify compatibility before shipping. Add your UK registration or the last seven characters of your VIN at checkout.

Manufacturer and warranty

Manufacturer: Fuel-It

Warranty: Fuel-It Limited Warranty

Part number

E-N54-LPFP-S1

Common search terms

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