What vehicles is the TREVORA ID-01 rear diffuser compatible with?

The TREVORA ID-01 Carbon Fiber Rear Diffuser is designed specifically for the 2021 and newer BMW M240i G42. It is designed for the M240i rear bumper configuration. Standard G42 2 Series models use a different rear bumper and fitment compatibility should be confirmed with Bulletproof Automotive before ordering.

Does the ID-01 diffuser require cutting or modification to the factory bumper?

No. The ID-01 rear diffuser installs using the factory bumper mounting points and OEM clips as primary attachment hardware. No cutting or permanent modification to the factory bumper is required, and the installation is fully reversible.

How does the three-fin design affect the aerodynamics of the M240i?

The three-fin diffuser geometry works with the airflow exiting beneath the rear of the G42 M240i, helping to manage turbulence at the rear end and contribute to a more stable aerodynamic profile. The fin configuration draws from the rear diffuser approach used on BMW M coupe models, where defined fin geometry is used to direct and separate exiting underbody airflow more effectively than a flat lower bumper panel.

What is the design reference behind the three-fin configuration?

The three-fin design references the rear diffuser treatment seen on recent BMW M coupe models, where multi-fin diffuser geometry has become a defining visual element of the M performance aesthetic. The ID-01 applies this language to the G42 M240i, connecting the model visually to the broader BMW M design direction while keeping the overall result within OEM+ boundaries.

Does the ID-01 diffuser integrate with the rest of the TREVORA ID-01 program for the G42?

Yes. The ID-01 rear diffuser is part of the TREVORA ID-01 exterior program for the G42 platform, which also includes the ID-01 front splitter and rear spoiler. All three components share the same design language and are developed to work together as a cohesive exterior package.

What is pre-preg carbon fiber and why does it matter on a rear diffuser?

Pre-preg carbon fiber is manufactured by pre-impregnating the carbon fabric with a precisely controlled resin ratio before the component is formed and cured. This produces a more consistent weave pattern, better structural integrity, and a higher-quality surface finish than wet layup carbon. On a rear diffuser with three integrated fins viewed from directly behind the car, surface consistency and weave alignment across the full panel are directly visible; pre-preg construction ensures both.

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Description

Trevora Carbon Rear Diffuser for G42 BMW M240i

The rear bumper of the G42 M240i is a performance coupe’s most visible angle at a standstill, and the ID-01 diffuser is built to make it work harder. The three-fin configuration draws directly from the rear diffuser language seen on BMW’s M coupe models, where defined fin geometry across the lower rear bumper has become a recognizable signal of performance intent. On the M240i, the effect is a rear end that reads as more purposeful and track-influenced without requiring the car to step outside its factory design identity. The fins are cleanly integrated into the diffuser body rather than appearing as additions to a base panel, producing a cohesive unit that sits against the factory bumper lines without disruption. From directly behind the car, the three-fin layout fills the lower bumper with structured visual interest; the kind of rear treatment that reads as considered rather than simply added on. Beyond the visual upgrade, the diffuser contributes to improved aerodynamic management beneath the rear of the vehicle. The fin geometry and diffuser profile work with the airflow exiting under the car, reducing turbulence and contributing to a more stable aerodynamic profile at the rear end.

Carbon Fiber Construction

Constructed using high-quality autoclave-cured pre-preg carbon fiber for superior strength-to-weight ratio. Each component is engineered and prototyped in-house using advanced CAD modeling and 3D scanning to achieve precise factory-plus fitment. A UV-resistant clear coat protects the clean weave pattern and maintains finish quality over time, ensuring long-term durability in both daily driving and high-performance environments.

Features

OEM+ fitment – engineered specifically for the listed BMW platform
Pre-preg autoclave-cured carbon fiber construction
UV-resistant clear coat finish
Superior strength-to-weight ratio versus wet-lay carbon
Direct OEM fitment
Plug-and-play installation
Backed by Trevora’s industry-leading 5-year warranty

Included in Box

Carbon Fiber Rear Diffuser
Required mounting hardware
Installation instructions

Applications

BMW M240i: G42 | 2021-present

Frequently Asked Questions

What vehicles is the TREVORA ID-01 rear diffuser compatible with? The TREVORA ID-01 Carbon Fiber Rear Diffuser is designed specifically for the 2021 and newer BMW M240i G42. It is designed for the M240i rear bumper configuration. Standard G42 2 Series models use a different rear bumper and fitment compatibility should be confirmed with Bulletproof Automotive before ordering.
Does the ID-01 diffuser require cutting or modification to the factory bumper? No. The ID-01 rear diffuser installs using the factory bumper mounting points and OEM clips as primary attachment hardware. No cutting or permanent modification to the factory bumper is required, and the installation is fully reversible.
How does the three-fin design affect the aerodynamics of the M240i? The three-fin diffuser geometry works with the airflow exiting beneath the rear of the G42 M240i, helping to manage turbulence at the rear end and contribute to a more stable aerodynamic profile. The fin configuration draws from the rear diffuser approach used on BMW M coupe models, where defined fin geometry is used to direct and separate exiting underbody airflow more effectively than a flat lower bumper panel.
What is the design reference behind the three-fin configuration? The three-fin design references the rear diffuser treatment seen on recent BMW M coupe models, where multi-fin diffuser geometry has become a defining visual element of the M performance aesthetic. The ID-01 applies this language to the G42 M240i, connecting the model visually to the broader BMW M design direction while keeping the overall result within OEM+ boundaries.
Does the ID-01 diffuser integrate with the rest of the TREVORA ID-01 program for the G42? Yes. The ID-01 rear diffuser is part of the TREVORA ID-01 exterior program for the G42 platform, which also includes the ID-01 front splitter and rear spoiler. All three components share the same design language and are developed to work together as a cohesive exterior package.
What is pre-preg carbon fiber and why does it matter on a rear diffuser? Pre-preg carbon fiber is manufactured by pre-impregnating the carbon fabric with a precisely controlled resin ratio before the component is formed and cured. This produces a more consistent weave pattern, better structural integrity, and a higher-quality surface finish than wet layup carbon. On a rear diffuser with three integrated fins viewed from directly behind the car, surface consistency and weave alignment across the full panel are directly visible; pre-preg construction ensures both.

About Trevora

Trevora (formerly TRE) is a UK-based automotive aero and styling brand specializing in high-performance pre-preg carbon fiber components. Founded in 2018, Trevora has grown into a globally recognized name in BMW aftermarket parts, known for its OEM+ philosophy, precision engineering, and uncompromising attention to detail. Every component is designed, engineered, and prototyped in-house using advanced CAD modeling and 3D scanning to achieve precise factory-plus fitment. By utilizing autoclave-cured pre-preg carbon fiber, Trevora delivers a superior strength-to-weight ratio while eliminating inconsistencies found in traditional wet-lay carbon. All products are backed by Trevora’s industry-leading 5-year warranty.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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