TRE Dry Carbon Fibre Rear Diffuser/Valance/Undertray (Pre-Preg, Autoclave, 2x2 Twill) for BMW M5 F90 & F90 LCI 2017-2023 - Carbon Fiber Lower Bumper Insert, Rear Apron, Rear Splitter Upgrade

TRE autoclave-cured dry carbon rear valance for BMW M5 F90 - a premium lower bumper upgrade that transforms the back end of the M5 with authentic motorsport presence. Manufactured in true pre-preg carbon fibre with a 2x2 twill weave, this performance aero insert tightens up the rear profile, enhances the exhaust surround and delivers that tasteful OEM plus look enthusiasts want on both pre-LCI and LCI models.

Why this upgrade stands out

• Autoclave pre-preg dry carbon - ultra clean weave and crisp edges for a high end finish
• Track inspired styling - sharper rear profile with purposeful fins and an aggressive stance
• Designed to suit factory bumper lines on F90 and F90 LCI - integrates like a factory part
• Lightweight composite construction - rigid, precise and built for longevity
• Ideal foundation for a cohesive aero package - pair with a boot lip spoiler or side skirts
• TRE quality that BMW M owners choose for fit, finish and consistency

We have installed this TRE dry carbon lower diffuser on our own builds and customer cars. Feedback has been superb, with owners praising the fitment, weave quality and the way it elevates the rear of the F90 without looking overdone.

What you receive

• 1 x TRE dry carbon lower bumper diffuser - 2x2 twill, pre-preg construction

Vehicle compatibility

• BMW M5 F90 2017 to 2020 pre-LCI
• BMW M5 F90 2020 to 2023 LCI facelift

Fitting and support

Professional installation recommended for the best result. MJ Modifications offers fitting at our Warwickshire workshop - request a quote via info@mjmodifications.co.uk.

Built for enthusiasts

This carbon fibre lower bumper insert is engineered for those who want a clean, performance-led finish that complements the F90 saloon. The autoclaved pre-preg process ensures a lightweight yet rigid part with excellent detail definition and an authentic 2x2 twill weave that matches other quality carbon components.

Search friendly terms

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