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BMS

Burger Motorsports BMS JB4 Anti-Lag Kit for BMW N54 135i & 335i - Instant Boost, Rapid Spool, On-the-Fly Control

Burger Motorsports BMS JB4 Anti-Lag Kit for BMW N54 135i & 335i - Instant Boost, Rapid Spool, On-the-Fly Control

£50.91
£52.50 £50.91
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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.

JB4 Antilag Add-On for BMW N54 135i and 335i

Give your twin turbo N54 the edge with this genuine Burger Motorsports antilag add-on for JB4-equipped 135i and 335i. Designed to pre-spool the turbos on demand, it delivers immediate boost for rolling starts and punchy launches, sharper throttle response, and harder acceleration between shifts. Ideal for drivers who want consistent, repeatable performance with their JB4-controlled BMW.

What you get

  • Pre-programmed control module with model-specific calibration
  • Dedicated plug-in wiring harness for a clean, reversible fit
  • Driver-activated antilag using the factory volume button

Why enthusiasts choose this upgrade

  • Preloads the turbos so boost is ready before you go
  • Stronger roll-on acceleration and harder hits from a dig
  • Crisper response during gear changes for brisk, consistent sprints
  • Genuine Burger Tuning hardware, designed to integrate with JB4
  • Proven on our own builds and with customer cars, delivering immediate response and repeatable results

How to use it

  1. Select your gear.
  2. Press and hold the volume button on the steering control.
  3. Go full throttle to build boost while stationary or during a roll.
  4. Release the button and go with boost already on tap.

Vehicle compatibility

For BMW 135i and 335i models with the N54 engine running a JB4. Works with manual and automatic transmissions.

Requirements

  • JB4 for N54 is required
  • BMS back end flash map required
  • Ethanol blend recommended for best results

Part number

E-N54-JB4UG-AL

Fitting and support

Professional fitting recommended. MJ Modifications in Warwickshire can install and set up this upgrade. Request a fitting quote at info@mjmodifications.co.uk.

View the installation guide

Compatibility check before dispatch

We will confirm fitment prior to shipping. Add your UK registration or the last 7 digits of your VIN at checkout so we can verify your N54 JB4 setup.

Manufacturer and warranty

Manufactured by Burger Motorsports.

Note, no manufacturer warranty is offered on this item.

Search-friendly terms

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