Performance M
Maxton Design Racing Line Side Skirts Splitters Extensions for BMW 4 Series F32 Coupe M Sport 2013-2016 (420i 428i 435i 440i) | Rocker Panel Side Blades Sill Lips Sill Extensions Ground Effects | ABS Plastic | Pair + Fitting Kit
Maxton Design Racing Line Side Skirts Splitters Extensions for BMW 4 Series F32 Coupe M Sport 2013-2016 (420i 428i 435i 440i) | Rocker Panel Side Blades Sill Lips Sill Extensions Ground Effects | ABS Plastic | Pair + Fitting Kit
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.
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Transform the side profile of your BMW 4 Series Coupé with Maxton Racing Line sill extensions designed specifically for the F32 M Sport package, model years 2013, 2014, 2015 and 2016. These rocker panel add ons deliver a sharper, lower look with a clean OEM plus fit that really finishes the factory M Sport styling. If you are searching for side blades, rocker extensions, sill lips, ground effects or aero side trims for your F32 M Sport, this is the set you want.
Why enthusiasts choose this kit
- Vehicle specific for BMW 4 Series F32 Coupé with M Sport exterior pack 2013 to 2016
- Manufactured from robust ABS thermoplastic for everyday road use
- Aggressive motorsport inspired appearance that reduces the visual ride height
- Supplied with dedicated fixings for a secure, straightforward installation
- TUV MATERIALGUTACHTEN certified material for peace of mind
- Designed to follow factory body lines for a premium, factory style finish
What is included
- Left and right Maxton Racing Line sill extensions
- Fitting hardware kit
Compatibility
Fits BMW 4 Series F32 Coupé with the M Sport body package, years 2013, 2014, 2015 and 2016. Suitable for M Sport variants including 420i, 428i, 435i and 440i in F32 form.
Material and quality
Produced from automotive grade ABS, the same type of material used widely on OE exterior components. It offers excellent impact resistance and flexibility for UK roads and daily driving. The material carries a TUV MATERIALGUTACHTEN certificate.
Proven on our builds
We run Maxton aero on our own cars and have installed these sill extensions for many customers. Feedback is consistently positive on fit, finish and the way they sharpen the stance of the F32 M Sport Coupé.
Fitting and support
Professional installation recommended. MJ Modifications offers fitting at our Warwickshire workshop. Request a quote by emailing info@mjmodifications.co.uk.
Popular search terms
BMW F32 M Sport rocker extensions. BMW 4 Coupé side blades. F32 sill extensions. BMW 4 Series ground effects side lips. Maxton Racing Line side trims for F32. BMW 420i 428i 435i 440i side blade kit. F32 M Sport side apron spoilers. BMW 4 body kit side add ons. Lower side extensions for F32 Coupé. ABS rocker covers for BMW F32. Motorsport style side lips for M Sport 4 Series.
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