Maxton Design Gloss Black Rear Diffuser / Centre Splitter with Vertical Fins for BMW 8 Series G16 Gran Coupe (2019+) M Sport/M Pack - Piano Black ABS Valance Lower Bumper Insert - Fits 840i 840d M850i

High-gloss rear lower diffuser insert with upright fins for BMW G16 8 Gran Coupé 2019 onwards, M Sport rear bumper

Give the back end of your 8 Gran Coupé the motorsport look it deserves. This precision-moulded centre section delivers a finned, race-inspired finish that complements the factory M Sport rear apron and sharpens the stance without looking out of place. The high-gloss black surface mirrors OEM black details and instantly lifts the rear profile for a more purposeful, performance-driven appearance.

• Tailored for the 2019 on BMW G16 8 Gran Coupé with M Sport rear bumper
• Piano black finish for a deep mirror shine
• Upright fins add a bold, aerodynamic aesthetic
• ABS polymer construction for durability and impact resistance
• Factory-style fit with a clean, flush look when installed correctly

Why enthusiasts choose this upgrade

• Transforms the rear profile with a more aggressive, track-inspired design
• Pairs perfectly with black styling packs, dark exhaust tips and shadow details
• Ideal visual match for other Maxton exterior styling on the G16 platform
• Built from tough ABS to withstand daily driving and UK weather

Compatibility

• For BMW 8 Series G16 4 door coupé 2019 onwards with M Sport package rear bumper
• Suitable across engine variants including 840i, 840d and M850i
• Not designed for non M Sport rear bumpers

In the box

• Rear lower centre piece with finned design

Quality and finish

• ABS thermoplastic noted for flexibility and resilience
• Supplied with a protective film to prevent marks in transit, remove before fitting
• High-gloss surface for a premium, factory-plus appearance

Installation

• Professional fitting recommended for best alignment and secure mounting
• Fitting guide: Download the Maxton rear centre splitter instructions
• Need it installed? MJ Modifications in Warwickshire can help. Request a fitting quote at info@mjmodifications.co.uk

Trusted by our customers

We have fitted this item in-house and feedback on fit, finish and the finned rear look has been excellent. Owners love the sharper stance and premium gloss appearance.

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Make your BMW 8 Gran Coupé stand out with a bold, finned rear aesthetic that looks factory fresh yet unmistakably sport focused. This is the go-to rear styling upgrade for G16 owners who want premium finish, precise fit and serious curb appeal.