Carbon Fibre CS Rear Spoiler for 4 Series & M4 Convertible by FORM (2014-2019, F33 F83)

Complete the rear aesthetic of your 4 Series & M4 Convertible with the Carbon Fibre CS Rear Spoiler from FORM. This precision-engineered spoiler bolts directly to the factory boot lid, transforming the car's profile while contributing to rear-end stability at speed.

Key Features:

• Direct OEM fitment — retains factory mounting points, wiring connectors, and sensor cut-outs where applicable
• Adds downforce over the rear axle for improved high-speed stability
• Lightweight carbon fibre construction with a UV-protected gloss clear coat
• Finishes the rear profile with a purposeful, motorsport-inspired look
• Complements the car's existing lines without dominating the silhouette
• Backed by FORM Industries — a trusted name in OEM-level aftermarket upgrades for modern performance cars

Materials & Construction: Manufactured from high-grade carbon fibre with a UV-stable clear coat, this component combines lightweight construction with the distinctive weave finish that defines performance-car styling.

Fitment Notes: Built to suit the 4 Series & M4 Convertible, model years 2014-2019, F33 F83. This is a direct-fit replacement or overlay depending on variant — the part matches the factory mounting pattern and panel geometry of the listed models, so a standard install is bolt-on / clip-on with no cutting or drilling required. If your car was built with a non-standard options pack, it's worth checking fitment with our team before ordering.

Installation: Fitment is straightforward for an experienced installer using standard hand tools. We strongly recommend installation by a qualified bodyshop or detailer, particularly for exterior components that require panel alignment, adhesive bonding, or painted-surface preparation. Full fitment guidance is provided in the box, and our support team can help confirm the best approach for your specific car.

The FORM Industries Difference: Where many aftermarket brands compete on price, FORM competes on fit and finish. Every part in the catalogue is developed on real cars — not just in CAD — with panel-gap tolerances, material selection, and finishing processes benchmarked against the OEM part it replaces. It's why FORM has become one of the go-to names for BMW M, Audi RS, and Porsche GT owners looking for an upgrade that genuinely measures up.