Upgrade the rear styling of your BMW with the MHC+ GTX Rear Diffuser for the F80 M3 & F82/F83 M4, a premium carbon fibre aero upgrade engineered to deliver aggressive motorsport-inspired styling with OEM-level fitment and finish. The diffuser integrates seamlessly with the factory rear bumper while adding greater depth, sharper fin detailing and a more technical rear-end appearance.
Manufactured from 100% pre-preg (“dry”) carbon fibre, it combines lightweight construction, exceptional rigidity and a flawless high-gloss finish – and it is the easiest component in the GTX range to fit, going on in around 15 minutes using solely the OEM mounting points.
Key Features
- Designed for the BMW F80 M3 & F82/F83 M4
- Premium GTX rear diffuser design
- Manufactured from 100% pre-preg (“dry”) carbon fibre
- OEM-style 2x2 twill carbon weave
- Deep high-gloss UV-resistant lacquer finish
- Developed using full 3D chassis scanning and CAD engineering
- Fits using solely OEM mounts – no drilling, no adhesive
- Direct replacement for the factory diffuser
- Modular design – undertray add-on can be fitted at any time
- 15-minute fit
- Backed by MHC LDN’s 3-year warranty
GTX Rear Aero Styling
The diffuser forms the main visual centrepiece of the rear, featuring:
- Aggressive fin detailing
- A deeper and more sculpted diffuser profile
- Enhanced rear-end definition
- A clean centre-section design inspired by motorsport aero concepts
Build It Your Way – Modular Add-Ons
This listing is for the GTX rear diffuser itself – a straight swap for the OEM item and a complete product on its own.
For the full GTX rear aero appearance, the MHC+ BMW F80 M3 & F82/F83 M4 GTX Ultra Aggressive Undertray Add On extends the diffuser further beneath the vehicle. You can:
- Buy both together as part of the complete MHC+ GTX Aero Kit
- Or add the MHC+ BMW F80 M3 & F82/F83 M4 GTX Ultra Aggressive Undertray Add On later as a modular upgrade – the two sections bolt together with the supplied M6 hardware, so nothing needs modifying
Fitment & Installation
Fits using: solely the OEM mounting points – the diffuser clips into place and reuses the factory self-tapping screws. No drilling and no adhesive required
Tools required – items marked (supplied) are included in the box:
- PZ2 driver bit (supplied)
- Trim removal tools
- Panel wipe or IPA and lint-free cloths (alcohol wipes supplied)
Time to fit: 15 minutes
Difficulty: Easy – no drilling required
Remove the old diffuser, clip the GTX diffuser into place with a firm push along its full length to engage every clip, then refit the OEM self-tappers on the underside.
All required fixings and consumables are supplied. Best fitted indoors, above 15°C, on a clean, dry car – trial fit before committing any adhesive tape. A full step-by-step GTX fitting guide is available, and professional installation is recommended for the best possible result.
Precision OEM-Level Fitment
MHC+ developed this component using:
- Full 3D scans of the BMW F8X chassis
- Advanced CAD modelling and engineering
- OEM-level panel alignment development
This ensures flush integration with the factory body lines, accurate panel alignment and OEM-style fitment quality. No cutting or compromise required.
Premium Pre-Preg Carbon Fibre Construction
Unlike conventional wet carbon fibre products, MHC+ uses genuine pre-preg (“dry”) carbon fibre, delivering:
- Increased strength and rigidity
- Reduced overall weight
- Superior weave consistency
- Minimal imperfections or air pockets
- Exceptional long-term durability
Each component is cured under controlled heat and pressure to achieve optimal resin saturation, producing a premium carbon fibre part suitable for high-end BMW builds.
Deep High-Gloss Finish
Finished in a premium UV-stable gloss lacquer, every GTX component offers:
- Excellent resistance to fading and yellowing
- A rich OEM-style appearance
- Seamless compatibility with other MHC+ carbon fibre components
Supplied Ready to Install
- PZ2 driver bit
- Alcohol wipes for surface preparation
- Reuses your OEM fixings throughout – keep every one you remove
- MHC LDN fitment guarantee
Compatibility
- BMW F80 M3
- BMW F80 M3 Competition
- BMW F82 M4
- BMW F82 M4 Competition
- BMW F83 M4 Convertible
- BMW F83 M4 Competition
Why Choose MHC+?
MHC+ is recognised globally for producing premium BMW carbon fibre styling upgrades with precise fitment, OEM-inspired design and exceptional manufacturing quality.
Upgrade your BMW with the MHC+ GTX Rear Diffuser, delivering aggressive GTX styling, premium pre-preg carbon fibre construction and OEM-quality fitment for the F8X M platform.