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F8X BMW M3 M4 & F3X BMW 3 and 4 Series Carbon Fiber Aero Side Skirt Extensions
F8X BMW M3 M4 & F3X BMW 3 and 4 Series Carbon Fiber Aero Side Skirt Extensions
F8X BMW M3 M4 & F3X BMW 3 and 4 Series Carbon Fiber Aero Side Skirt Extensions
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F8X BMW M3 M4 & F3X BMW 3 and 4 Series Carbon Fiber Aero Side Skirt Extensions

$597.00 $497.00


F8X BMW M3 M4 & F3X BMW 3 and 4 Series Carbon Fiber Aero Side Skirt Extensions

The PhaseCarbon Aero carbon fiber side skirt extensions were designed to fit multiple BMW models, including the F80 BMW M3, F82 & F83 BMW M4, F30, F31 BMW 3 Series, F32, F33, and F36 BMW 4 Series! These are installed right below the stock side skirt rocker panels and adds an incredibly clean stance to your vehicle!

These are a perfect match to complement any other carbon fiber aerodynamic parts you may already have on your BMW, or simply as a modder's first upgrade. They are very simple and straight forward to install. No matter what, these side skirt extensions are sure to please any enthusiast and will definitely turn heads.

When you shop with us, you can buy with confidence that you will be getting a top notch product backed by incredible customer service and a money back guaranty. We stand behind our manufacturing and QC process to ensure that you are getting a spectacular product that looks great and fits great.

Fits the following BMW models:
  • 2014-2019 F80 M3 Sedans
  • 2014-2019 F82/F83 M4 Coupes and Convertibles
  • 2012-2018 F30 3 Series Sedans
  • 2014-2020 F32/F33/F36 4 Series Coupe, Convertible, and Gran Coupes
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We are typically very quick and have a 24-48 hour turnaround time. Transit time depends on your order and which warehouse we are shipping from, but typical transit times are between 5-7 business days from one side of the US to the other.

Majority of the items we offer do ship free to the lower contiguous 48 states. States that require plane or boat to reach (such as Hawaii, Alaska, Puerto Rico, etc) do NOT qualify for free shipping. Please contact us to inquire about international shipping costs. During checkout, you will know which items ship free and which have shipping costs associated with them. In general, larger/heavier items will have additional shipping costs (body kits, wheels/rims, etc)

Even though everything can be shipped internationally, sometimes the cost is simply just too high and doesn't make sense to do so. We're here to make sure you have a great shopping experience, so if you have a product(s) you want to inquire about, please contact us at

Yes, we do price match reputable competitors in the marketplace. If you find a product cheaper elsewhere, please email us the (1) link of the product from our website and (2) the link to the competitor site. We will make an assessment on our end if we are able to price match or not and respond to you via email.

Typically you have 14 days to return a product you purchase when you change your mind. Damaged and improperly installed products are NOT eligible for returns. Shipping fees may be assessed and not refunded based on criteria as well as restocking fees. Please see our FAQ page for more details.

Unfortunate Kies Motorsports no longer does customer installs (with the exception of crank hubs - we still do thos inhouse). Our HQ is solely reserved for filming, office space, and shipping/receiving.

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