Rear Diffuser for BMW 3 Series G20 (2019+)

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Adding a more aggressive rear diffuser to your BMW can offer some performance benefits, but is primarily an aesthetic upgrade. BMWs naturally look great from the rear, why not make yours look even better?
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3D Design M-Sport Carbon Rear Diffuser - G20 3-Series
For Pre-LCI vehicles only (production date up to 07/2022) For Vehicles Equipped with the M-Performance Aerodynamics Kit (S715A)
3D Design - Corporate Logo
T#:4634865
Part#: 3108-32021
Ships in 3 Business Days
$ 2,295.00 USD
Free Shipping
$ 2,295.00 USD
Free Shipping
This gorgeous rear diffuser from 3D Design boasts all the major values this brand embodies; exquisite attention to detail, masterful finish work, and supreme fitment. Featuring a dry carbon-fiber weave pattern laid with care and attention, and a deep rich clear coat finish that will last for years to come, this is a part worth far more than its weight in carbon. 3D Design is focused on high-quality styling components that allow you to personalize the look of your BMW & remain true to the car's original form. Inspired by European tuning trends & Japan's unique VIP tuning style, their wide range of lips, diffusers, side skirts, & spoilers are made from high-quality urethane or super light, super strong prepreg dry carbon and install easily to your factory bumpers & skirts to offer an understated, aggressive performance look. For non-M340i installation, the following OEM parts are needed: 51128079607 51718091107 Fits 3D Design 4 tail tip exhaust or M340i OEM exhaust
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Spec-D M Sport Black ABS Performance Style Rear Diffuser - 2019-2020 ...
For Pre-LCI vehicles only (production date up to 07/2022)
Spec-D Tuning - Corporate Logo
T#:14684347
Part#: LFRDG2019GBMP-BN
Ships in 7 Business Days
$ 93.99 USD
$ 93.99 USD
Brand new in original box Comes with 1 piece M performance style rear diffuser Made of high-quality, black ABS plastic Paintable to match your vehicle Decreases the drag force, improving aerodynamics Gives your vehicle a more aggressive sporty appearance
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G20 M340 ABS Rear Window Spoiler With ABS Diffuser
For Pre-LCI vehicles only (production date up to 07/2022)
Enthusiast Bundles - Corporate Logo
T#:25042562
Part#: 008653LA01EBKT
In Stock
$ 688.98 USD
Free Shipping on orders $49 and up
$ 688.98 USD
Free Shipping on orders $49 and up

Upgrade your BMW G20 M340's exterior with the Turner In-House designed Gloss Black Rear Diffuser. Recognizing the satisfaction of G20 M340 owners with Turner's Carbon Diffuser, the engineers at Turner Motorsport created a more cost-effective OEM + version.

This in-house engineered diffuser is designed for aftermarket exhausts up to 4" in diameter, adding an aggressive appearance that complements the factory appeal of your M340. Crafted from UV-stabilized ABS polymer, the diffuser achieves a deep high gloss shine, setting your vehicle apart with an aggressive and sporty style. The dual tip/dual outlet design is compatible with aftermarket exhaust systems up to 4" in diameter.

Installation is hassle-free, requiring no drilling, cutting, or modification. Simply remove your current valance, align the tabs, and press the diffuser into place. Make a bold statement and let your BMW stand out with the Turner Gloss Black Diffuser!

  • Designed and engineered in-house using 3D laser scanning and CAD technology
  • Mimics lower bumper section & OE diffuser lines for enhanced OEM features
  • Compatible with aftermarket exhausts up to 4.0"
  • Mounts to OE clip locations and OE holes on the outer edges
  • Lightweight, vacuum-formed UV-stabilized gloss black ABS polymer

Enhance your car's appearance with the G20 rear window spoiler from Turner Motorsport. Crafted from high-quality UV-stabilized polymer, this gloss black spoiler adds a sporty design with a sleek look. The straight-edged roof spoiler design, featuring a center cutout, requires no drilling, cutting, or modifications.

The spoiler matches all other gloss black components from Turner Motorsport and installs effortlessly. After aligning, remove the liner from the attached high-strength dual-sided tape and firmly press the spoiler onto the window. Make a distinctive statement and elevate your vehicle's style with Turner Motorsport's free Gloss Black Rear Window Spoiler.

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G20 3-Series M-Sport Carbon Rear Diffuser
For Pre-LCI vehicles only (production date up to 07/2022) For Vehicles Equipped with the M-Performance Aerodynamics Kit (S715A)
3D Design - Corporate Logo
T#:587530
Part#: 3108-32011
Ships in 3 Business Days
$ 2,295.00 USD
Free Shipping
$ 2,295.00 USD
Free Shipping

G20 M340 Carbon Diffuser & Carbon High Kick Spoiler
For Pre-LCI vehicles only (production date up to 07/2022)
Enthusiast Bundles - Corporate Logo
T#:24909620
Part#: 013748LA01EBKT
Ships Nov 26, 2025
$ 2,025.97 USD
Free Shipping on orders $49 and up
$ 2,025.97 USD
Free Shipping on orders $49 and up

Enhance the allure of your BMW G20 M340i/xDrive with the Turner Motorsport Carbon Fiber Diffuser – a result of meticulous engineering by Turner's experts dissatisfied with existing G20 M340 diffuser options. This direct bolt-on upgrade, designed in-house using advanced 3D laser scanning and CAD technology, redefines exterior styling. The diffuser boasts a deep profile, an aggressive fin design, and hand-laid 2x2 pre-preg carbon fiber, ensuring a head-turning experience. Elevate your BMW's presence and make a bold statement with Turner's exclusive Carbon Fiber Diffuser.

Key Features & Specifications:

  • In-house design for precision fitment
  • Mounts to existing bumper insert locations with OE hardware
  • Crafted from lightweight, hand-laid epoxy resin pre-impregnated 2x2 twill weave carbon fiber
  • Autoclave cured for superior durability
  • Clear coated for excellent finish durability and UV resistance
  • Can be painted for a color-matched look with standard body shop prep work
  • Rated to withstand 100°C (212°F) continuous use, and 120°C (248°F) intermittent use

As part of the Enthusiast Bundle, the Carbon High Kick Trunk Spoiler from Turner Motorsport offers an aggressive style upgrade for the rear end of your G20. The hand-laid gloss carbon fiber and a design that seamlessly aligns with the G20 body lines create a truly beautiful finish. Easy installation, with no drilling required – simply clean the trunk surface, remove the backing from the pre-attached high-strength double-sided tape, line it up, and press firmly down. For optimal adhesion, we recommend installing in a warm environment.

Design Features and Benefits:

  • Aesthetic Upgrade
  • Follows the deck lid and roof contours to accentuate OEM features
  • In-house design for precision fitment
  • Includes pre-applied adhesive tape
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