HAW RSC Style Dry Carbon Fiber 7 Pieces Rear Diffuser for BMW M3 G80 / G81 M4 G82 / G83
HAW RSC Style Dry Carbon Fiber 7 Pieces Rear Diffuser for BMW M3 G80 / G81 M4 G82 / G83
Prepreg Dry Carbon Construction
Every HAW carbon fibre product is manufactured using a prepreg dry carbon process. The carbon fibre fabric is autoclave-cured under high temperature and pressure, with resin content precisely controlled between 37% and 42%. This ensures each piece achieves exceptional structural rigidity while remaining significantly lighter than wet carbon alternatives.
We use Toray standard-grade 3K twill-weave carbon fibre tow to produce our fabric. 3K means each carbon bundle contains approximately 3,000 individual filaments. The twill weave creates the classic diagonal texture — one that shifts subtly under changing light, understated yet impossible to ignore.
HAW RSC Style Dry Carbon Fiber 7 Pieces Rear Diffuser – BMW M3 G80 G81 / M4 G82 G83
Redefine the rear end with precision aerodynamics. The HAW RSC Style dry carbon fiber rear diffuser is a 7-piece system engineered to optimise rear-end negative pressure, increase downforce, reduce turbulence, and lower drag — all while delivering an aggressive, race-inspired aesthetic on your BMW M3 or M4. Precision-crafted in prepreg dry carbon for a piece that performs as aggressively as it looks.
Key Features
- Dry Carbon Fiber Construction – Autoclave-cured prepreg carbon, lighter and stiffer than wet carbon alternatives, finished in a premium 3K twill weave
- RSC Style 7-Piece Design – Multi-element diffuser system with precisely shaped fins and blades that work together to manage rear airflow at a system level
- Optimised Rear Negative Pressure – The 7-piece configuration creates a structured low-pressure zone beneath the rear bumper, pulling the car closer to the road surface
- Increased Downforce – Enhanced rear downforce improves high-speed stability and cornering confidence without added weight
- Reduced Turbulence – Channelled airflow through the multi-element fins minimises chaotic wake behind the vehicle for a cleaner aerodynamic profile
- Lower Drag – Streamlined rear airflow management reduces aerodynamic drag, supporting efficiency and top-end performance
- Direct OEM Fitment – Designed specifically for G80 / G81 / G82 / G83 chassis; no cutting or modification required
- UV-Resistant Clear Coat – Protects the carbon weave from yellowing and fading over time
- Significant Weight Reduction – Lighter than the factory plastic rear diffuser
Available Finishes
- Gloss Dry Carbon – High-gloss clear coat for a deep, reflective finish
- Matte Dry Carbon – Satin clear coat for a subtle, stealth look
Fitment
- BMW M3 Sedan (G80)
- BMW M3 Touring (G81)
- BMW M4 Coupe (G82)
- BMW M4 Convertible (G83)
What's Included
- 7x HAW RSC Style dry carbon fiber rear diffuser pieces
- Fitting hardware
Professional installation recommended. Please verify fitment with your chassis code before ordering.