BMW Aero Designs Gallery: Front Lips, Rear Diffusers & Sideskirts Compared

Aero changes a BMW more than almost any other mod — but ‘lip,’ ‘diffuser,’ and ‘sideskirt’ each cover a dozen different designs. This gallery puts the designs side by side on real cars, so you can see what a bumper-hugging M Performance lip looks like next to a flat Maxton blade, or a finned diffuser next to a smooth one. Every photo is credited to its owner where known; photos with unknown photographers are marked as such and can be claimed by their owner. Follow the source link under each photo for full build specs.

Photos are credited to their owners where known. If one of these is yours and isn’t credited, claim it in the comments or by tagging @johnson_motorsports_diys and we’ll add your credit and link your socials.

Front Lips & Splitters

M Performance front lip on an F32 435 xDrive
M Performance front lip on an F32 435 xDrive.
Photo: Jeff on Flickr, via Ultimateone / BimmerPost.
Source: BimmerPost thread
Carbon-fibre one-piece CSL front lip on a Turner Motorsport E46 M3 shop car
Carbon-fibre one-piece CSL front lip on a Turner Motorsport E46 M3 shop car.
Photo credit: unknown — is this your car? Claim it: leave a comment below or tag @johnson_motorsports_diys and we’ll add your credit and socials.
Source: Apex Wheels customer showcase
Carbon-fibre front splitters on an E90 LCI with an M-Sport bumper
Carbon-fibre front splitters on an E90 LCI with an M-Sport bumper.
Photo: Nick Gregson / ModBargains.
Source: ModBargains product spotlight
Carbon-fibre GT4 front lip with splitter and splitter rods, plus dive planes, on an E92 Coupe
Carbon-fibre GT4 front lip with splitter and splitter rods, plus dive planes, on an E92 Coupe.
Photo: @bronzedon15 / Apex Wheels gallery.
Source: Apex Wheels gallery
Tegiwa M4-style front splitter on a BMW M4 endurance race build
Tegiwa M4-style front splitter on a BMW M4 endurance race build.
Photo credit: unknown — is this your car? Claim it: leave a comment below or tag @johnson_motorsports_diys and we’ll add your credit and socials.
Source: Apex Wheels customer showcase
RKP Carbon GP front lip with AJ Hartman Aero custom splitter with tunnels, plus canards, on a 2017 BMW M2 Club Racer
RKP Carbon GP front lip with AJ Hartman Aero custom splitter with tunnels, plus canards, on a 2017 BMW M2 Club Racer.
Photo: Silver Style Pictures / Apex Wheels.
Source: Apex Wheels customer showcase
MKAH Motorsports race splitter on an E36 M3
MKAH Motorsports race splitter on an E36 M3.
Photo: MKAH Motorsports / Apex Wheels gallery.
Source: Apex Wheels gallery
3D Design carbon-fibre front lip spoiler and lower splitter on a Black Sapphire Metallic F10 M5
3D Design carbon-fibre front lip spoiler and lower splitter on a Black Sapphire Metallic F10 M5.
Photo: Strasse_Andrew on Flickr, via BimmerPost.
Source: BimmerPost thread
RW Carbon centre carbon-fibre front lip spoiler on an F10 M5
RW Carbon centre carbon-fibre front lip spoiler on an F10 M5.
Photo credit: unknown — is this your car? Claim it: leave a comment below or tag @johnson_motorsports_diys and we’ll add your credit and socials.
Source: RW Carbon blog
Front lip / splitter under the M-sport bumper on an F30
Front lip / splitter under the M-sport bumper on an F30.
Photo: @Pipewerks / Apex Wheels gallery.
Source: Apex Wheels gallery

Rear Diffusers

BMW E90 335i with a BMW Performance Style Full Carbon Fiber Rear Diffuser
BMW E90 335i with a BMW Performance Style Full Carbon Fiber Rear Diffuser.
Photo credit: unknown — is this your car? Claim it: leave a comment below or tag @johnson_motorsports_diys and we’ll add your credit and socials.
Source: RW Carbon blog
BMW F30 335i with an M Performance Quad diffuser and a Remus exhaust
BMW F30 335i with an M Performance Quad diffuser and a Remus exhaust.
Photo: Nick Gregson.
Source: ModBargains blog
2014 BMW F30 328i with a Performance Style Rear Diffuser and an AWE Tuning Quad Exhaust
2014 BMW F30 328i with a Performance Style Rear Diffuser and an AWE Tuning Quad Exhaust.
Photo: Nick Gregson.
Source: ModBargains blog
BMW G82 M4 with a Kiess Motorsports carbon fiber rear diffuser
BMW G82 M4 with a Kiess Motorsports carbon fiber rear diffuser.
Photo: @WillisWeese.
Source: Apex Wheels gallery
TrackSpeed's G87 M2 with a Vulcan Alpha aero package rear diffuser
TrackSpeed’s G87 M2 with a Vulcan Alpha aero package rear diffuser.
Photo credit: unknown — is this your car? Claim it: leave a comment below or tag @johnson_motorsports_diys and we’ll add your credit and socials.
Source: Apex Wheels technical discussion
Rear diffuser on an E90 build
Rear diffuser on an E90 build.
Photo: @sonydvo / Apex Wheels gallery.
Source: Apex Wheels gallery

Sideskirts & Blades

RW Carbon carbon-fibre side skirt extensions for the 2019+ G20 3 Series
RW Carbon carbon-fibre side skirt extensions for the 2019+ G20 3 Series.
Photo: RW Carbon.
Source: RW Carbon product page
Gloss-black side lip with a finned winglet kick-up at the rear, for the G20/G21 3 Series
Gloss-black side lip with a finned winglet kick-up at the rear, for the G20/G21 3 Series.
Photo: Alpha Carbons.
Source: Alpha Carbons product page
Spreek carbon side skirt attachment on Basic Performance's F80 M3 Clubsport
Spreek carbon side skirt attachment on Basic Performance’s F80 M3 Clubsport.
Photo: APEX Wheels / Basic Performance.
Source: Apex Wheels customer showcase
Carbon side skirt on GT Performance's F8x M4 Clubsport, photographed at Dijon-Prenois Circuit
Carbon side skirt on GT Performance’s F8x M4 Clubsport, photographed at Dijon-Prenois Circuit.
Photo: APEX Wheels / GT Performance.
Source: Apex Wheels customer showcase
MKAH Motorsports side skirts on an E36 M3 track car
MKAH Motorsports side skirts on an E36 M3 track car.
Photo: APEX Wheels / MKAH Motorsports.
Source: Apex Wheels customer showcase
3D Design-style side skirt extension splitter on an F82 M4
3D Design-style side skirt extension splitter on an F82 M4.
Photo credit: unknown — is this your car? Claim it: leave a comment below or tag @johnson_motorsports_diys and we’ll add your credit and socials.
Source: Carousell listing
Side skirt blades on a 2021 G20 M340i
Side skirt blades on a 2021 G20 M340i.
Photo credit: unknown — is this your car? Claim it: leave a comment below or tag @johnson_motorsports_diys and we’ll add your credit and socials.
Source: Cars & Bids auction

Your Car Could Be Here

Your car could be here — tag @johnson_motorsports_diys on Instagram with your aero setup to be featured.

Looking for a design that is not in this gallery yet? Tag @johnson_motorsports_diys on Instagram with your aero setup to request it and be featured.

Browse the platform galleries: E90 3-Series, F30 3-Series, G20 3-Series, F10 5-Series, G30 5-Series, and X3 / X5. Also try the wheel offset calculator.

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