BMW 1 Series F20/F21 LCI Rear Valance Fin Extensions - Rear Diffuser Fins/Strakes/Aero Blades for M140i | M Performance Style Rear Bumper Add-Ons | For Aftermarket Diffusers (Fins Only, Diffuser Not Included)

Rear Valance Fin Extensions for BMW 1 Series LCI

Give your facelift BMW hatchback a sharper, motorsport-inspired tail with these rear valance fin extensions made for the BMW 1 Series LCI platform. Designed to sit alongside a performance rear diffuser, these strakes add serious attitude and a purposeful, track-ready look that transforms the back end of your F20 or F21.

We run these on our own builds and customer cars, and the reaction has been consistently positive. Clean fit, aggressive style, and the right visual balance for daily-driven hot hatches and weekend toys alike.

Key highlights

• Race-inspired rear valance blades that amplify the stance of your BMW 1 Series LCI
• Pairs perfectly with a performance rear diffuser for a more dynamic, road-race aesthetic
• Instant visual upgrade that complements splitters, side skirts and spoilers
• Proven on our own cars with great feedback from UK enthusiasts

Fitment

• Models: BMW 1 Series F20 LCI and F21 LCI including BMW M140i LCI
• Fins only. Rear diffuser is not included
• Requires an aftermarket rear diffuser. Not suitable for the standard factory valance

Why choose these rear blades

• Big styling impact for a clean, OEM-plus finish
• Enhances the aggressive character of the LCI hot hatch without looking overdone
• Ideal for street, show and track-look builds
• Trusted by our community and fitted on multiple MJ Modifications project cars

Professional installation

Want it fitted right first time? Book installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms

BMW 1 Series LCI rear valance blades. F20 LCI rear strakes. F21 LCI rear aero fins. M140i LCI rear styling fins. BMW hot hatch facelift rear blades. BMW 1 Series LCI tail diffuser strakes. Rear bumper styling for BMW 1 Series facelift. M Performance style rear fins for BMW 1 Series. BMW F20 F21 LCI rear splitter strakes. Performance rear valance extensions UK. BMW 1er LCI Heckdiffusor Lamellen. Rear undertray fins for BMW hatchback. BMW tuner styling parts UK.

Note: fins only. Diffuser not included.