Performance M
Maxton Design Street Pro Side Skirts / Sill Extensions / Side Splitters for BMW Z4 G29 M Sport (M Package) 2018–2024 – Black 10mm ABS Rocker Panel Blades, Lower Sill Spoilers, Ground Effects, M Performance Style
Maxton Design Street Pro Side Skirts / Sill Extensions / Side Splitters for BMW Z4 G29 M Sport (M Package) 2018–2024 – Black 10mm ABS Rocker Panel Blades, Lower Sill Spoilers, Ground Effects, M Performance Style
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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Maxton Design Street Pro Sill Extensions for BMW Z4 G29 M Package 2018 to 2024 - Black 10 mm ABS
Give your BMW Z4 G29 a sharper, lower road presence with Maxton Design Street Pro sill extensions. Purpose-built for the M Package model years 2018 to 2024, these rocker panel blades deliver a race-inspired look that complements the Z4’s sculpted lines and enhances the car’s stance from every angle.
Made from robust 10 mm ABS in black, the Street Pro lower sill blades feel solid and premium in hand. At MJ Modifications we have fitted these on customer cars and our own demos, and the feedback has been superb. Fitment is clean, alignment is tidy and the transformation is immediate. If you want a purposeful OEM-plus finish without compromise, this is the upgrade to choose.
Why owners choose Street Pro
- Thick 10 mm ABS construction for a rigid, high-quality feel
- UV stabilised, weather resistant and ready for daily use
- Impact and scratch resistant surface for long-lasting good looks
- Supplied in black for an OEM-plus appearance with no painting needed
- Optional variant: matte black with a red core accent for a subtle colour pop
- Vacuum sealed with protective film to help prevent transit marks
- Genuine Maxton Design item with authenticity labelling
- TUV MATERIALGUTACHTEN certified material
Compatible vehicles
- BMW Z4 G29 2018, 2019, 2020, 2021, 2022, 2023, 2024
- M Package models only
What is included
- Left and right Street Pro sill extensions
- Mounting hardware
Finish options
- Standard: black
- Optional: matte black with red core accent
- No paint required. If painting, use primer first
Installation
Professional fitting recommended. MJ Modifications offers expert installation in Warwickshire. For a fitting quote, email info@mjmodifications.co.uk.
Style and pairing
These rocker extensions sit neatly along the factory sills to create a lower visual line and a motorsport look. They pair perfectly with front lips and rear valance pieces for a complete aero styling package on the G29 roadster.
Search-friendly terms customers use
BMW Z4 G29 sill extensions, Z4 rocker panel blades, G29 side splitters, Z4 M Package ground effects, BMW Z4 lower sill spoilers, Maxton Street Pro sill blades, Z4 M Performance style skirts, BMW roadster aero kit, G29 body styling, Z4 2018 to 2024 rocker extensions.
Add instant presence to your Z4 with proven quality and a fit you can trust. Order today.
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