BMW 4 Series F32 F33 F36 Side Skirts – Matte Black M Performance Style Rocker Extensions, Sill Extensions & Side Skirt Extensions | Fits 2013-2020 Coupe, Convertible & Gran Coupe | M Sport & Non-M Sport | CT Carbon BLAK

Stealth black sill extensions for BMW F32 F33 F36 – M Performance inspired look

Give your 4 Series a sharper, lower and more purposeful profile with these CT Carbon BLAK range sill blades. Engineered for the F-chassis 4er, these rocker panel extensions add assertive OEM-plus styling that complements both M Sport and non M Sport bumpers. The stealth black finish delivers that factory-inspired motorsport vibe without being shouty, transforming the side profile with a clean, aggressive line.

We have fitted these on customer cars and our own builds and the result speaks for itself – excellent fit, tidy edges and a premium look that elevates the whole body kit. UK enthusiasts love the way these rocker trims extend the car’s stance and visually lower the car for a more planted appearance.

Compatible models

• BMW 4 Series F32 Coupe – 2013 to 2020
• BMW 4 Series F33 Convertible – 2013 to 2020
• BMW 4 Series F36 Gran Coupe – 2013 to 2020

Why choose these rocker extensions

• M Performance inspired design lines for that OEM-plus aesthetic
• Stealth black finish that pairs perfectly with carbon lips, diffusers and mirror caps
• Precise F32 F33 F36 fitment for a clean, factory-style install
• Enhances side profile, adds visual width and a sportier stance
• Ideal upgrade to complete your aero kit alongside front splitters and rear spats

Search-friendly fitment and style terms

BMW F32 rocker extensions, F33 rocker blades, F36 sill blades, 4er side splitters, M Sport side trims, BMW 4 Series side extensions, stealth black sill covers, F-series aero kit, coupe cabriolet gran coupe styling, OEM style rocker skirts, performance body styling for BMW 4 Series.

Installation

Professional fitting recommended for best alignment and finish. MJ Modifications offers in-house installation in Warwickshire. Request a fitting quote via info@mjmodifications.co.uk.

Note: Designed specifically for the BMW F32 F33 F36 platform for a seamless, premium look. If you are building a full aero package, these pair perfectly with front splitters and rear bumper corner spats for a cohesive, motorsport-inspired visual.