Maxton Design Gloss Black Side Skirt Diffusers / Side Splitters / Sill Extensions (Pair) for BMW 5 Series G30 Saloon/Sedan 2017–2020 | ABS Side Blades, Rocker Panel Extensions, Side Lips | Fitting Kit Included

Gloss Black Sill Extensions Pair for BMW 5 Series G30 Saloon 2017 to 2020 by Maxton Design

Transform the stance of your BMW 5-Series G30 with these high gloss side blades from Maxton Design. Precision-formed from automotive-grade ABS, this left and right pair adds instant visual width and a lower, sportier profile while flowing perfectly with the G30’s factory lines. Supplied with fixings, they are an easy, impactful exterior styling upgrade for 2017, 2018, 2019 and 2020 saloon models.

Why enthusiasts choose these sill extensions

• Vehicle-specific moulding for the BMW 5-Series G30 Saloon, ensuring a neat, consistent fit
• Deep, high-gloss black surface for a premium, paint-like finish that complements any body colour
• Durable ABS construction that is lightweight and built for daily road use
• Visually lowers the car and sharpens the side profile for a more aggressive, performance look
• Supplied as a pair with installation hardware and instructions for a straightforward fit
• Ideal to combine with a front lip, rear diffuser and boot spoiler for a cohesive styling package

Compatibility

Designed for BMW 5-Series G30 Saloon, model years 2017 to 2020.

In the box

• 2x sill extensions, left and right
• Mounting hardware
• Fitting instructions

Material and finish

Manufactured from high quality ABS for strength and flexibility, finished in a high-gloss black that delivers a clean, premium look straight out of the box.

Installation

Professional fitting recommended for best alignment and secure mounting. We offer installation at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Fitting guide: View the Maxton Design side skirts diffusers manual

Our experience

We have installed these Maxton Design sill extensions on our own G30 builds and customer vehicles. Fitment has been consistently accurate, the gloss finish ties in beautifully with other Maxton components, and customer feedback on the transformation to the side profile has been excellent.

Good to know

Each piece arrives with a protective film to safeguard the finish during transit. Test fit before final install, then remove the film to reveal the flawless gloss surface.

Search-friendly terms

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