Performance M
Maxton Design Street Pro Rear Diffuser - BMW 3 Series G20/G21 Saloon & Touring M Sport M-Pack (2018+) - Matte Black
Maxton Design Street Pro Rear Diffuser - BMW 3 Series G20/G21 Saloon & Touring M Sport M-Pack (2018+) - Matte Black
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 insert by Maxton Design for BMW 3 Series G20 G21 with factory M Sport rear apron
Sharpen the back end of your 3 Series with a track-inspired rear lower section that looks purposeful on the road and at shows. This Maxton Design Street Pro piece brings pronounced vertical fins and a deeper, more aggressive profile while keeping daily usability intact. Built from premium 10 mm ABS and finished with a UV-stable surface, it is tough, weather resistant and ready for year-round British driving.
We run this on our own G20 demo car and the feedback from customers has been consistently positive for alignment, finish and durability. If you want a clean OEM plus look with a motorsport edge, this is the rear styling upgrade to choose.
Compatibility
- BMW 3 Series G20 Saloon 2018 onwards with M Sport rear bumper
- BMW 3 Series G21 Touring 2018 onwards with M Sport rear bumper
- Fits only vehicles equipped with the M-Pack M Sport rear apron
What is included
- Maxton Design Street Pro rear diffuser insert
- Mounting hardware kit
Why choose it
- Street Pro styling for a bold, motorsport-inspired rear end
- 10 mm thick ABS for excellent impact and scratch resistance
- UV protective finish helps prevent fading and discolouration
- Temperature and weather resistant for dependable longevity
- Vacuum sealed with protective film to keep the surface pristine in transit
- No painting required
- If painting, apply primer first
- Genuine product labelled for authenticity
- TUV MATERIALGUTACHTEN certified material
Available finishes
- 10 mm matte black
- 10 mm matte black with red core accent
Installation and fitting
Supplied with a fitting kit for a secure, professional install. Professional installation is recommended.
Want it fitted by specialists We offer installation at MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
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