Rear Diffuser for BMW G82 M4 S58 3.0L

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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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Turner Motorsport - Corporate Logo
T#:16940491
Part#: 048254LA01KT
In Stock
Sale - Save 25% $ 536.99

This product was last offered at the strikethrough price on
06-14-2026

$ 402.74 USD
Free Shipping
Sale - Save 25%
$ 536.99

This product was last offered at the strikethrough price on
06-14-2026

$ 402.74 USD
Free Shipping

Upgrade the exterior styling on your G80/G82 with our In-House designed and engineered ABS Rear Diffuser. Utilizing factory mounting locations and supplied hardware this diffuser is a direct bolt-on upgrade that can be installed directly in place of your factory diffuser. Featuring a deep profile, an aggressive fin design, and extending the entire width of the rear bumper, our exclusive design is sure to turn heads! Our engineers did an absolutely amazing job on this diffuser from the styling to the fit and finish that is guaranteed to stand out in the market.

Pay close attention to the design characteristics of the diffuser. The emphasized outline of the diffuser adds a whole new dimension to the rear bumper bringing out the beautiful body lines of the G80. By adding an aggressive fin design and boxing around the exhaust exits the rear/side view is almost transformed into a whole new sub model that BMW forgot to offer.

Features & Specifications:

Designed to accentuate the G80/G82 body lines
Perfectly houses quad 4.0" exhaust tips for upgraded and factory exhausts
Designed in-house using state of the art 3d laser scanning and CAD technology for precision fitment
Mounts to existing bumper insert mounting locations with supplied hardware
Made from lightweight, vacuum-formed ABS polymer, with UV-stabilized gloss black sheet
Mimics the lower section of the bumper with added character to amplify OEM features
Product Development:

Our Turner Motorsport Rear Diffuser was designed, engineered, tested and quality inspected by our Research and Development team. We strive for the highest level of precision and quality through leading edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modelling, rapid prototyping utilizing our in-house 3D printer, and rigorous long term product testing.

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AUTOTECKNIC - Corporate Logo
T#:14419810
Part#: BM-0341
In Stock
$ 600.00

This product was last offered at the strikethrough price on
08-10-2026

$ 528.00 USD
Limited Qty Sale
$ 600.00

This product was last offered at the strikethrough price on
08-10-2026

$ 528.00 USD
Limited Qty Sale
The rear end of your G8X will thank you for this carbon diffuser trim set, giving it a more aggressive and sportier look! Manufactured from the highest-quality dry carbon, this diffuser set is one of the best carbon trim options on the market for your car!
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AUTOTECKNIC - Corporate Logo
T#:14452852
Part#: BM-0881
Ships in 7 Business Days
$ 895.00 USD
$ 895.00 USD
This rear diffuser is AutoTecknic's newly released dry carbon fiber product for the G8X M3/ M4. The diffuser is designed to mount directly onto the lower factory mounting location for a fast and straightforward installation. Manufactured using 100% genuine 3K Twill-Weave (2X2) Pre-Preg Carbon Fiber with our signature autoclave technology, this diffuser is finished with multiple coatings of high-gloss UV-resistant clear coat. Following the weight-saving principles of motorsport ideals, we utilize the autoclave vacuum forming process to produce this diffuser with superior strength and fitment. Change your car's look and satisfy your carbon cravings today!
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AUTOTECKNIC - Corporate Logo
T#:38655160
Part#: BM-0045-G82
Ships in 7 Business Days
$ 650.00 USD
Free Shipping on orders $49 and up
These Carbon fiber side splitters upgrade aerodynamics and create a bold appearance of your G82/G83 M4. Designed for optimal performance, durability, and a dynamic, track-ready aesthetic.

AUTOTECKNIC - Corporate Logo
T#:14419866
Part#: BM-0880
Ships in 7 Business Days
$ 850.00 USD
$ 850.00 USD
This rear diffuser is AutoTecknic's newly released dry carbon fiber product for the G8X M3/ M4. The diffuser is designed to mount directly onto the lower factory mounting location for a fast and straightforward installation. Manufactured using 100% genuine 3K Twill-Weave (2X2) Pre-Preg Carbon Fiber with our signature autoclave technology, this diffuser is finished with multiple coatings of high-gloss UV-resistant clear coat. Following the weight-saving principles of motorsport ideals, we utilize the autoclave vacuum forming process to produce this diffuser with superior strength and fitment.
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