BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)
BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)
BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)
BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)
BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)
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  • Load image into Gallery viewer, BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)
  • Load image into Gallery viewer, BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)
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BMW 1 Series F20/F21 LCI Rear Diffuser Fins – Aggressive Fin Extensions for BMW M140i LCI | Aftermarket Rear Diffuser Add-Ons (Fins Only; Diffuser Sold Separately)

£70.00
£70.00
£89.00
Sold out
Tax included. Shipping calculated at checkout.

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.

BMW F20 LCI Aggressive Diffuser Fins

Turn up the presence of your BMW 1 Series with our aggressive rear diffuser fin extensions, purpose-made for the F20 LCI and F21 LCI platform. If your aftermarket 1 Series rear diffuser isn’t bold enough, these rear fins deliver the track-inspired, performance look enthusiasts want. They completely transform the tame, standard BMW diffuser and dial in a more purposeful, motorsport-style rear end.

This upgrade has been seriously popular with our 1 Series community. We run these fins on our own builds and customer cars, and the feedback on the look and fit has been fantastic.

Why choose these BMW 1 Series diffuser fins

  • Aggressive rear diffuser fins for BMW 1 Series F20 LCI and F21 LCI
  • Instant visual upgrade that complements an aftermarket rear diffuser
  • Enhances stance and presence for a race-inspired rear profile
  • Proven on our own Nforcd cars and loved by customers

Compatibility and requirements

  • Chassis: BMW 1 Series F20 LCI, F21 LCI including BMW M140i LCI
  • These are fins only. Rear diffuser is sold separately.
  • Requires an aftermarket rear diffuser. Not compatible with the standard OEM diffuser.
  • Works with the Nforcd aftermarket rear diffuser: Nforcd M140i Rear Diffuser

Fitting and support

Prefer professional installation? Book fitting with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.

Search-friendly details

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Note: fins only. Diffuser not included.