K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light - F3X 3-Series
/ PRODUCT ·DIFFUSER

K Style Carbon Fiber Rear Diffuser w/ F1 Brake Light

4.9 228 ratings
[ VERIFIED FITMENT ]
F3X 3-SERIES
$549.00 $480.00
/
Shipping calculated at checkout.
Black Friday: use code BF2026 at checkout for 15% off.
  • Shipped from USA
/ 0.5 · PAIR WITH

Additions
/ 01 · OVERVIEW

This diffuser comes with a real working LED 3rd brake light that will work with your brake lights. The K Style diffusers are made using our same genuine 2x2 carbon fiber fabric as our other M3/M4 parts. Each piece is clear coated for that brilliant shine and to help protect it from harsh road conditions. For any questions or concerns please email us at sales@horizonmotorsport.com or contact us via the contact form.

FITMENT

- BMW F30 3-SERIES w/ M-Sport Package

/03·SHIPPING
Ships in 1-3 Days
Flat Rate Shipping
Fully Insured

Processing: In-stock items typically ship within 1–3 business days. We do our best to get every order out as quickly as possible. All orders are quality-checked and ship with full insurance coverage. If an item is out of stock, we'll reach out ASAP with an ETA.

Carriers: Carbon fiber and performance parts ship via UPS. Smaller items ship via USPS.

Tracking: You'll receive a confirmation email when your order ships with a tracking link — you can also track it anytime from the order page linked in that email. Allow 1–3 business days for tracking to update.

International: We ship worldwide. Contact us at sales@horizonmotorsport.com for international shipping quotes.

Signature: We may require a signature for high-value orders. Please be available during your estimated delivery window.

/ 04 · CUSTOMER BUILDS

Built by Our Customers

Customer-built. Running HM parts.
FEATURED BUILD
G80 M3 Competition
OWNER

AP2 Performance

Orange County, CA
SPEC SHEET
VR1 FRONT GRILLSP2 FRONT LIPPERFORMANCE V1 SIDE SKIRTSPERFORMANCE V1 DIFFUSERPERFORMANCE V1 INLETS
@ap2.performance
F80 M3
OWNER

Brian

Los Angeles, CA
SPEC SHEET
CS V2 FRONT LIPPERFORMANCE V1 SIDE SKIRTSV STYLE DIFFUSERPERFORMANCE V2 MIRROR CAPSGTS STYLE HOOD
@bbriaann_
A90 Supra
OWNER

Danny

Orange County, CA
SPEC SHEET
AG1 FRONT LIPAG1 SIDE SKIRTSAG1 REAR SPATS
OWNER

Brandon

Irvine, CA
SPEC SHEET
VR1 FRONT LIPCSL V1 FRONT GRILLPERFORMANCE V1 INLETSPERFORMANCE V1 MIRROR CAPSHM S58 CATBACK EXHAUST

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Horizon Motorsport - Est. 2019

Built for BMW Enthusiasts

We specialize in quality aftermarket parts for BMW M-cars. Every part we carry is selected, inspected, and shipped with the same care you'd give your own build. Our goal: help you get your car looking and performing exactly how you envisioned it.

Learn More
/ ? · ASK A QUESTION

Have a question about this part?

Fitment uncertainty, install details, compatibility with other mods — whatever it is, our team replies personally, usually within 24 hours.

We read every message. Usually respond within 24 hrs.

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