MHC+ BMW F80 M3 & F82/F83 M4 GTX Rear Diffuser In Pre Preg Carbon Fibre

Transform the rear-end styling of your BMW with the MHC+ GTX Rear Diffuser for the F80 M3 and F82/F83 M4, a premium carbon fibre aero upgrade engineered to deliver a sharper, more technical and motorsport-inspired appearance. Developed as a complete two-piece rear aero system, the GTX diffuser integrates seamlessly with the factory rear bumper while adding greater depth, aggressive fin detailing and a purposeful centre-section design that perfectly complements the wider F8X platform.

Manufactured from 100% pre-preg (‘dry’) carbon fibre, the GTX diffuser combines lightweight construction, exceptional rigidity and a flawless OEM-style finish. Every component is produced using advanced heat and pressure curing processes to ensure optimal resin saturation, resulting in superior strength, weave consistency and long-term durability.

Key Features

• Designed for BMW F80 M3 & F82/F83 M4
• Premium GTX-style rear diffuser design
• Manufactured from 100% pre-preg (“dry”) carbon fibre
• OEM-style 2x2 twill carbon fibre weave
• Deep high-gloss UV-resistant lacquer finish
• Developed using full 3D chassis scanning and CAD engineering
• OEM-quality fitment and panel alignment
• Optional lower undertray available for complete GTX rear aero setup
• Supplied with all required mounting hardware
• Pre-applied automotive-grade adhesive tape where required
• Backed by MHC LDN’s 3-year warranty

Complete GTX Rear Aero Design

The GTX diffuser has been engineered as a complete rear aerodynamic solution for the F8X platform.

The Upper Diffuser Section creates the primary visual transformation, adding:

• Sharper rear-end styling
• Aggressive fin detailing
• Enhanced depth and structure
• A more purposeful centre diffuser profile

For owners wanting the full GTX aesthetic, the optional Lower Undertray extends the diffuser further underneath the vehicle, creating a more substantial and technically focused rear profile that visually balances aggressive front aero upgrades.

Precision Engineered Fitment

Unlike generic aftermarket diffusers, the MHC+ GTX diffuser was developed using:

• Full 3D scans of the BMW F8X chassis
• In-house CAD engineering
• Full-scale 3D-printed prototype testing

This development process ensures:

• OEM-level fitment accuracy
• Consistent panel alignment
• Seamless integration with the factory bumper

Why Choose Pre-Preg Carbon Fibre?

MHC+ uses genuine pre-preg (“dry”) carbon fibre construction, offering major advantages over traditional wet carbon fibre:

• Increased strength and rigidity
• Significantly lighter weight
• Superior weave consistency
• Reduced risk of imperfections or air pockets
• Higher-quality gloss finish

The result is a premium carbon fibre product built for long-term durability and exceptional visual quality.

Supplied Ready to Install

The diffuser is supplied ready for installation with:

• Required mounting hardware
• Pre-applied automotive adhesive tape where necessary
• MHC LDN fitment guarantee

Professional installation is recommended for best results.

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+ has become one of the most recognised BMW carbon fibre brands in the aftermarket industry, known for precise fitment, premium materials and OEM-inspired styling.

Why Buy from R44 Performance?

R44 Performance supplies premium BMW styling and performance upgrades trusted by enthusiasts worldwide.

• BMW specialists
• Genuine high-quality carbon fibre products
• Fast UK & international shipping
• Expert support and product knowledge

Upgrade the rear styling of your BMW with the MHC+ GTX Rear Diffuser, delivering premium pre-preg carbon fibre construction, aggressive GTX styling and OEM-quality fitment for the F8X M platform.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

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We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.