BMW M3 G80 / M4 G82 Prepreg Dry Carbon Fiber CSL Side Skirts

Engineered for BMW M3 G80 and M4 G82 owners, this Prepreg Dry Carbon Fiber CSL Side Skirt set adds aggressive race-track styling and aerodynamic discipline to your car's side profile. Inspired by the M4 CSL (G82), these skirts visually lower and widen the stance of both M3 G80 Sedan and M4 G82/G83 Coupé/Convertible. Manufactured in Europe and quality-controlled by BYC Performance, this BMW G80/G82 carbon side skirt bolts directly to OEM rocker panel mounting points.

If you're building a BMW M3 G80 tuning or M4 G82 modification project and want to add CSL aerodynamic language, this skirt set is a top-tier upgrade — visually and functionally. Autoclave-cured prepreg carbon is noticeably lighter than wet-lay parts, with superior strength and outstanding UV resistance. Matches the race character of the S58-powered G-generation M family (M3 G80 473 hp, Competition 503 hp, CS 543 hp; M4 G82 + CSL 543 hp).

Key Features

• CSL-Inspired Design: Brings the aggressive M4 CSL G82 side profile language to the entire G80/G82 lineup.
• Prepreg (Dry) Carbon Technology: Pre-impregnated plies autoclave-cured under high heat and pressure — a more consistent weave.
• Dual Profile Fit: Direct fit on M3 G80 Sedan and M4 G82/G83 Coupé/Convertible rocker panels.
• Aerodynamic Channeling: Disciplines side airflow, reduces turbulence at speed.
• 2x2 Twill Carbon Weave: Authentic carbon pattern under a high-gloss UV-protective clear coat.
• Direct OEM Fit: Uses existing clips + 3M tape. No drilling required.
• UV & Chemical Protection: Long-life clear coat resists fading and cracking.

Prepreg (Dry) Carbon vs. Wet Carbon — Which Is Better?

Most aftermarket carbon parts use wet lay-up, where resin is hand-applied at room temperature — leaving voids and inconsistent weight. Prepreg (dry) carbon:

• Cured in an autoclave under high heat and pressure → a more consistent weave
• Controlled resin ratio → lighter and stronger
• The production method widely chosen in motorsport
• Minimal UV fading over years of use

Vehicle Fitment

This BMW G80/G82 carbon CSL side skirt fits the following models:

• BMW M3 G80 Sedan (2021+) — S58 (473/503 hp)
• BMW M3 Touring G81 (2022+) — S58 (503 hp)
• BMW M3 CS G80 (2023+, limited) — S58 (543 hp)
• BMW M4 G82 Coupé (2021+) — S58 + Competition + CSL (543 hp)
• BMW M4 G83 Convertible (2021+) — S58 (503 hp)

NOTE: NOT compatible with M3 F80 / M4 F82 (previous generation, S55) — different rocker panel geometry. NOT compatible with M2 G87.

Technical Specifications

• Material: Prepreg Carbon Fiber (2x2 Twill Weave)
• Manufacturing: Autoclave Cure
• Finish: High-Gloss Clear UV-Protective Resin
• Color: Natural carbon weave black
• Origin: Europe

Installation Notes

1. Detach OEM skirts from clips.
2. Clean bonding surface with isopropyl alcohol.
3. Dry-fit the carbon skirt for alignment.
4. Peel adhesive backing progressively and apply pressure.
5. Secure clips and supplied bolts.
6. Avoid washing for 24 hours.

Care & Maintenance

Wash with pH-neutral shampoo. Apply carbon-safe sealant every 6 months. Keep pressure washer 30 cm away.

FAQ

Does this fit both M3 G80 and M4 G82?
Yes. M3 G80 Sedan and M4 G82 Coupé share the same rocker panel geometry; M4 G83 Convertible is also compatible.

How does it differ from OEM?
The CSL profile features more aggressive lines and a higher spine, visually lowering the car's side profile. Aerodynamic channels are more pronounced than OEM.

Compatible with M3 CS, M4 CS, M4 CSL?
Yes. All G80/G82 trims (standard, Competition, CS, CSL) share the same rocker mounting geometry.

Compatible with M3/M4 F80/F82 (previous gen)?
No. F-generation uses different rocker geometry and the S55 engine.

Compatible with M2 G87?
No. M2 G87 has different side profile geometry.

Will rain damage dry carbon?
No. Autoclave-cured prepreg carbon is fully waterproof.

Shipping time?
In-stock items ship within 1-3 business days. International shipping available.

Warranty?
BYC Performance offers a 12-month manufacturer warranty.

Why BYC Performance?

BYC Performance is a Turkey-based performance tuning specialist sourcing premium carbon fiber parts from leading European manufacturers. Our catalog includes BMW M3 carbon parts, BMW M4 carbon side skirts, Audi RS carbon hoods, Porsche carbon spoilers, and many more. All parts are sourced from leading European manufacturers and undergo strict quality control.