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Carrera Custom Garage

BMW F80 M3 / F82 F83 M4 Carbon Fiber Rear Diffuser with Integrated F1 LED Brake Light (2015–2020) | F8X

Motorsport Aero Fins | Plug-and-Play F1 Third Brake Light | 3K 2x2 Twill Weave Carbon Fiber

$849.95 USD
$849.95 USD
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In stock

  • OEM-quality fit and finish
  • Direct bolt-on installation, no cutting required
  • Free return, refund or replacement if it doesn't fit

Dispatched in 1–3 business days · Free tracked shipping

Fitment confirmed before shipping
Free shipping, duties paid
360-day warranty

Description

Inject track-inspired styling and enhanced visibility into your BMW F8X with the Carrera Custom Garage Carbon Fiber Rear Diffuser featuring an Integrated F1-Style LED Brake Light. Engineered specifically for the 2015–2020 BMW F80 M3 Sedan, F82 M4 Coupe, and F83 M4 Convertible, this rear aerodynamic valance combines deep center aero fins with a high-intensity red LED brake light module.

Handcrafted from premium 3K 2x2 twill weave carbon fiber and finished with an ultra-glossy, UV-resistant resin clear coat, this diffuser provides exact OEM bumper alignment, thermal protection against exhaust heat, and long-term durability.

Specifications

Feature Specification
Brand Carrera Custom Garage
Chassis Compatibility BMW F80 M3 / F82 M4 / F83 M4 (F8X Platform)
Model Years 2015, 2016, 2017, 2018, 2019, 2020
Material Real 3K 2x2 Twill Weave Carbon Fiber (CFRP)
Finish High-Gloss UV-Protected Clear Coat
Lighting Unit Integrated Ultra-Bright Red F1-Style LED Brake Light
Exhaust Clearance Fits Stock Quad Tips & Aftermarket Systems up to 102mm (4")
Installation Direct Clip-In Replacement & OEM Screw Mounting


Key Highlights

  • Integrated F1 Brake Light: Central high-intensity red LED module increases vehicle rear visibility and delivers an authentic motorsport appearance.

  • 3K 2x2 Twill Carbon Weave: Handcrafted carbon fiber offering high strength-to-weight ratio and precise weave uniformity.

  • UV & Thermal Shielding: Sealed in a heat-resistant gloss clear coat designed to prevent resin yellowing and heat fade near exhaust tips.

  • Aerodynamic Styling: Extended lower air channels improve underbody airflow detachment while framing factory or aftermarket quad exhaust systems.

Vehicle Compatibility Guide Compatible only with factory BMW F8X M rear bumpers:

  • BMW M3 Sedan (F80): 2015–2020

  • BMW M4 Coupe (F82): 2015–2020

  • BMW M4 Convertible (F83): 2015–2020

Note: Fits original factory F80 M3 and F82/F83 M4 rear bumpers. Does NOT fit standard F30 3 Series or F32 4 Series bumpers.

Installation Details

  • Diffuser Fitment: Direct clip-in replacement for the OEM plastic lower valance using factory undershell screw locations.

  • Lighting Wiring: Includes an inline wiring harness. Taps directly into the factory rear inner tail light/brake light wiring (Ground, Running Light, Brake Light signal).

Frequently Asked Questions (FAQ)

Q: How does the F1 LED brake light wire into the car?

A: The included harness connects to your rear tail light wiring loom. It draws low power from the 12V system to illuminate with your running lights and brighten upon brake application.

Q: Will this fit with aftermarket exhausts?

A: Yes, the exhaust cutouts are enlarged to clear both stock M quad tips and larger aftermarket exhaust tips up to 102mm (4 inches).