Trevora BMW F97 X3 M / F98 X4 M Carbon Side Skirt Set

Side skirts on a performance SUV platform carry a specific visual responsibility. The height and width of the F97 X3 M and F98 X4 M means the side profile is viewed across a longer span than a conventional sports car, and a well-fitted carbon skirt along the rocker line creates a lower optical center that makes the car read as more planted and more purposeful from every lateral angle. The TREVORA skirts address this by extending the lower body line cleanly along the factory rocker panel area, following the natural sill geometry of both the F97 and F98 without introducing elements that sit out of character with either platform’s design. The skirts are engineered to fit both the F97 X3 M and F98 X4 M despite the distinct body styles of the two platforms, which share a common floor and rocker panel structure beneath their different body shapes. Each skirt is developed for accurate fitment from the front of the rocker panel to the rear, ensuring correct panel alignment across the full length of the sill on both chassis.

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

• Premium carbon fibre construction with high-gloss OEM+ finish
• Engineered for accurate fitment from front to rear of the rocker panel on both platforms
• Improves the visual balance of the vehicle from the side by lowering the optical centre
• No structural modification to the vehicle required
• Includes left and right skirts as a complete matched pair
• Backed by Trevora’s industry-leading 5-year warranty

Included in Box

• Carbon Side Skirts
• Required mounting hardware
• Installation instructions

Applications

• BMW X3 M: F97 | 2019-2021
• BMW X4 M: F98 | 2019-2021

Frequently Asked Questions

• What vehicles is the TREVORA carbon side skirt set compatible with? The TREVORA Carbon Side Skirt Set is compatible with the 2019 and newer BMW X3 M F97 and the 2019 and newer BMW X4 M F98. Fitment on X3 M Competition or X4 M Competition variants, or other BMW models, should be confirmed with Bulletproof Automotive before purchasing.
• Does the set include both left and right skirts? Yes. The TREVORA Carbon Side Skirt Set includes both the left and right skirts as a complete matched pair. No additional purchase is required to cover both sides of the vehicle.
• Does installation require any structural modification to the vehicle? No. The side skirts are designed to fit directly to the factory rocker panel area without requiring structural modification to the vehicle. The specific mounting method should be confirmed with Bulletproof Automotive before installation, as the source material does not detail whether clips, adhesive, or hardware are used.
• Why are side skirts beneficial on the F97 X3 M and F98 X4 M? The height and length of an SUV side profile means the rocker panel area spans a larger visual distance than on a conventional sports car or saloon. A carbon side skirt along the sill line creates a lower optical center from the side, making the car read as wider and more planted. On the F97 X3 M and F98 X4 M, this visual grounding effect is particularly noticeable given the platform’s ride height and overall proportions.
• Are these skirts compatible with both the F97 X3 M and F98 X4 M despite their different body styles? Yes. The F97 X3 M and F98 X4 M share a common floor and rocker panel structure beneath their different body shapes. The TREVORA side skirts are engineered to fit the shared rocker panel geometry of both platforms, making them compatible across both the X3 M and X4 M body styles in a single product.
• Do these skirts work alongside the TREVORA F97 body kit? The TREVORA carbon side skirt set and the TREVORA F97 X3M body kit are separate products within the TREVORA X3 M lineup. The body kit includes a front splitter, rear diffuser, and rear spoiler; the side skirts provide the lower body sill treatment that completes the exterior upgrade across all four sides of the vehicle. Contact Bulletproof Automotive for guidance on building a complete exterior package for the F97 or F98 platform.

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.