Performance M
Maxton Design V2 Gloss Black Side Skirts / Splitters / Skirt Diffusers / Sill Extensions for BMW 1 Series F40 (M135i xDrive & M Sport) 2019-2024 ABS Side Blades Rocker Extensions Pair
Maxton Design V2 Gloss Black Side Skirts / Splitters / Skirt Diffusers / Sill Extensions for BMW 1 Series F40 (M135i xDrive & M Sport) 2019-2024 ABS Side Blades Rocker Extensions Pair
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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V2 Gloss Black Sill Extensions for BMW F40 1 Series M135i and M Sport 2019 onwards
Give your F40 1 Series the road presence it deserves with these V2 gloss black side blades from Maxton Design. Purpose-built for the M135i and M Sport models, this pair of rocker panel extensions tightens up the profile, visually lowers the car, and adds that crisp OEM plus look enthusiasts want. The fit is clean and model-specific, the style is aggressive yet refined, and the finish ties in perfectly with factory high-gloss trim.
We run these on our own cars and the feedback from customers has been outstanding. The transformation is instant. Expect a sharper silhouette, a wider stance, and a premium gloss finish that looks right at home on any well-presented F40 build.
Why this upgrade works
- Vehicle-specific design for BMW F40 1 Series M135i and M Sport 2019 onwards
- High-gloss black surface for a seamless factory plus aesthetic
- Automotive-grade ABS for strength, impact resistance, and flexibility
- Sleek V2 profile enhances side lines and complements other aero pieces
- Transforms the side view with a lower, broader, more purposeful stance
- Supplied as a left and right pair with mounting hardware and instructions
Fitment
- BMW 1 Series F40 M Sport 2019 onwards
- BMW 1 Series F40 M135i 2019 onwards
In the box
- V2 side blades - left and right
- Fitting kit
- Installation guide
Material and finish
Manufactured from high quality ABS plastic for durability and flexibility. Supplied with a protective film to safeguard the surface during transit and trial fitment. Remove the film after test-fitting to reveal the deep gloss black finish.
Installation and support
Professional fitting recommended for the best alignment and finish. MJ Modifications offers installation at our Warwickshire workshop. For a fitting quote, email info@mjmodifications.co.uk.
Download the official fitting guide: Side Skirt Diffusers Installation Manual
Why buy from MJ Modifications
- Trusted UK performance styling specialists
- Products we use ourselves and confidently recommend
- Excellent customer feedback on fitment, quality, and visual impact
Search-friendly terms
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