Performance M
Maxton Design Street Pro Performance Rear Diffuser for BMW M4 G82 2021+ (Carbon Package/Carbon Pack) – Rear Valance, Lower Bumper Insert, Rear Splitter – Fits M4 Competition – 10mm ABS – Matte Black or Black/Red Core
Maxton Design Street Pro Performance Rear Diffuser for BMW M4 G82 2021+ (Carbon Package/Carbon Pack) – Rear Valance, Lower Bumper Insert, Rear Splitter – Fits M4 Competition – 10mm ABS – Matte Black or Black/Red Core
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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Street Pro rear lower diffuser insert for BMW M4 G82 2021 onwards
Give the back end of your G82 a motorsport look with this Street Pro lower bumper diffuser from Maxton Design. Tailored for the BMW M4 G82 with the factory Carbon Package only, this deep-profile aero piece delivers a factory-plus aesthetic, razor-sharp fitment and serious rigidity thanks to its 10 mm ABS construction. Choose a stealth satin-style matte black finish or make it pop with matte black featuring a red accent core.
Shoppers searching for G82 M4 rear valance, rear bumper insert, aero diffuser, lower rear splitter, ground effects kit, rear underbody trim or BMW M4 Competition diffuser upgrade will find this the perfect match. It looks right at home on road cars and weekend track builds, tidying airflow around the lower bumper while elevating the stance with a purposeful, performance-led design.
Highlights
- Vehicle specific fit for BMW M4 G82 2021 on, Carbon Package models only
- Street Pro range from Maxton Design for a race-inspired, OEM-plus appearance
- Robust 10 mm ABS for impact and scratch resistance, ideal for daily use
- UV protected, temperature stable and weather resistant to keep the finish looking fresh
- No painting required out of the box
- Finish options: 10 mm matte black or 10 mm matte black with red core detail
- Supplied vacuum sealed with protective film and authenticity labelling
- TUV MATERIALGUTACHTEN certified material
What you receive
- Maxton Design Street Pro rear lower diffuser
- Fitting hardware kit
Compatibility
BMW M4 G82 2021 onwards. For cars equipped with the factory Carbon Package only. Not suitable for non Carbon Package rear bumpers.
Why enthusiasts choose this upgrade
This is the diffuser we recommend when you want a clean, aggressive finish without compromising daily usability. The 10 mm ABS feels solid in hand and sits tight to the bumper for that premium, factory-style install. Matte black keeps things subtle, while the black with red core option adds a distinctive accent line that ties in with performance styling cues. We run Maxton Design parts on our own cars and customer feedback on fit, finish and durability has been consistently excellent.
Installation and support
Professional fitting is advised. For installation, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk. Supplied with a mounting kit and protective film to keep the surface pristine during install. If you choose to paint the diffuser, use a suitable primer first.
Search-friendly notes
G82 M4 rear valance, BMW M4 lower bumper diffuser, M4 Competition G82 aero, rear undertray trim, rear bumper insert, rear splitter style trim, performance aero diffuser, M4 G82 Carbon Pack diffuser, BMW M4 rear ground effects, rear lower skirt, UK BMW styling parts.
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