Group 17: JB4 for VW EA888 Gen4 on MK8 VW GTI
Group 17: JB4 for VW EA888 Gen4 on MK8 VW GTI
Group 17: JB4 for VW EA888 Gen4 on MK8 VW GTI
Group 17: JB4 for VW EA888 Gen4 on MK8 VW GTI
Group 17: JB4 for VW EA888 Gen4 on MK8 VW GTI
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Group 17: JB4 for VW EA888 Gen4 on MK8 VW GTI

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£687.70
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£687.70
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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.

Unlock serious, safe performance from your EA888 Gen4 Volkswagen, Audi or Skoda with the JB4 Group 17 plug-in tuning box from Nforcd. Built for the MK8 GTI and other listed EA888 Gen4 applications, this advanced piggyback ECU uses full CANbus integration with direct AFR control to deliver strong gains while retaining factory safety systems.

Typical increases start from 50 bhp and 55 ft lb on 95 RON fuel, rising to around 65 bhp and 65 ft lb on 98 RON. With selectable maps, boost by gear for improved traction and optional Bluetooth control, you can tailor the setup to your driving and fuel.

  • Plug and play, user adjustable tuning box with CANbus integration and direct AFR control
  • Safety features for boost, air fuel ratio, fuel trims and engine knock
  • Up to 8 selectable maps, including ethanol E85 compatible options
  • Boost by gear for 1st to 3rd to help manage wheelspin and maximise grip
  • Optional JB4 PRO Bluetooth adapter and free app for live gauges, data logging, map switching, firmware updates and diagnostics
  • Integrated water methanol control, billet aluminium enclosure, not VIN locked and quick to remove

Smooth OEM-like drivability is maintained and all driving modes remain usable. Fuel economy remains unchanged during normal driving. 95 RON or higher is required for performance gains.

Confirmed compatibility for EA888 Gen4 models with electric assist includes:

  • 2021 onward Volkswagen Golf GTI MK8
  • 2025 onward Volkswagen Golf GTI Mk8.5
  • 2024 onward Volkswagen Atlas 2.0 TSI
  • 2021 onward Skoda vRS 180 kW 245 hp
  • 2021 onward Audi A3 8Y 201 hp

Nforcd knows this product well and it is a popular choice with our customers looking for a fast, reversible upgrade. Order your JB4 Group 17 today or contact us for advice on the best map and setup for your car.

Prefer a professional install? Fitting is available through Nforcd in Warwickshire. Request a fitting quote via Sales@nforcd.com.