CMST Pre-preg Carbon Fiber Rear Diffuser for BMW I4 M50 / e Drive 40 G26

Elevate the aggressive stance and aerodynamic profile of your BMW i4 with the CMST Pre-preg Carbon Fiber Rear Diffuser. Designed specifically for the BMW i4 M50 and eDrive 40 models (G26 chassis) from 2022 onwards, this premium aftermarket component replaces the factory rear valance to deliver a sharper, more purposeful look that complements the vehicle's sleek 4-door coupe design. Crafted by CMST, this diffuser is a direct upgrade for models equipped with the M Sport package bumper, transforming the rear aesthetic with high-performance style.

Constructed from authentic Pre-preg Dry Carbon Fiber, this rear diffuser offers exceptional strength-to-weight ratio and a flawless, consistent weave pattern. Each piece is protected by a durable UV-resistant clear coat, available in a high-gloss finish as standard or an optional matte finish for a more subdued appearance. The one-piece carbon sheet construction ensures there are no broken lines or seams, presenting a single, uninterrupted carbon fiber texture that signifies top-tier manufacturing quality.

• Precise Fitment: Designed for the BMW i4 M50 / eDrive 40 (G26) with M Sport bumper (2022-ON). Does not fit the base model bumper.
• Premium Material: Manufactured from real Pre-preg (Dry) Carbon Fiber with a UV protection clear coat for longevity and fade resistance.
• Custom Finish & Weave: Choose from a Gloss (default) or Matte finish. Select your carbon pattern: Woven Carbon (standard), Forged Carbon, or Honeycomb Carbon (latter two are made-to-order options).
• OEM+ Installation: Direct replacement using factory mounting points. For optimal fitment, bumper removal is recommended, and professional installation is advised (approx. 3 hours).

Supplied as a complete kit and backed by the trusted quality of AME Motorsport, this CMST diffuser is the definitive choice for enhancing your BMW i4's rear-end aesthetics.