G8X M3 | M4 G8X Type 3 Gloss Black Rear Diffuser (F1 Light)
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BMW G80 M3 / G82 M4 Gloss Black F1 Rear Diffuser
📦 In Stock & Ships from California within 1–2 Business Days
Aggressive Motorsport Design. OEM-Grade Fitment.
Transform the rear of your G80 M3 or G82 M4 with this Gloss Black F1-Style Rear Diffuser, designed to deliver a race-inspired aesthetic while maintaining perfect OEM fitment.
Crafted with precision-molded ABS construction, this diffuser brings a sleek, high-gloss finish and a bold Formula 1–inspired center LED light for maximum street presence.
Unlike lower-quality replicas, this piece is built to fit seamlessly — no large gaps, uneven edges, or flimsy plastic. Every contour aligns with factory mounting points, ensuring an OEM-like fit and finish that complements the M3/M4’s aggressive lines.
Features & Details
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✅ High-Gloss Piano Black Finish – Deep reflective shine to match factory trims.
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✅ OEM-Style Precision Fitment – Engineered using 3D scanning and CAD data for accuracy.
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✅ F1-Style Center Light Design – Adds a motorsport-inspired aesthetic.
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✅ Durable ABS Construction – Lightweight yet impact-resistant.
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✅ Direct Bolt-On Replacement – Uses factory mounting locations (no major modifications required).
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✅ Enhances Rear Aerodynamics – Channel airflow for improved rear stability and style.
Fitment
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BMW G80 M3 (2021–2025)
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BMW G82 M4 (2021–2025)
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Compatible with both OEM and aftermarket exhaust systems that retain factory diffuser layout.
While this diffuser is designed for direct bolt-on installation, professional installation is highly recommended to ensure perfect alignment and secure mounting.
Why Buy from Legendary Auto Builders
When you purchase from Legendary Auto Builders, you’re investing in:
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🔧 Quality-tested fitment and hand-inspected parts
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🚚 Fast California fulfillment (no long China shipping waits)
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💎 Premium materials and factory-level quality control
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🤝 Trusted reputation among top performance shops in the U.S.
G8X M3 | M4 G8X Type 3 Gloss Black Rear Diffuser (F1 Light)
We’ve got you.
Whether it’s fitment questions, order updates, or install guidance, our team’s here to make sure you get the right parts, the first time. Fast replies, real support, no runaround.
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Shipping Information
We ship fast and nationwide. Most in-stock items leave our SoCal warehouse within 1–3 business days. You'll get tracking as soon as it’s on the way. Need it quicker? Expedited options are available at checkout.
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Customer Support
Questions about your order? Our support team is here to help every step of the way. Reach us by email or DM.
Fast responses, real solutions, no bots.
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Contact Us
Whether it’s about your order, install guidance, or wholesale inquiries, don’t hesitate to reach out.
📞 Phone: +1 (949) 371-5212
📧 Email: orders@legendaryautobuilders.com
📍 Visit Us: 21087 Commerce Pointe Drive, Walnut, CA 91789We’ll always do our best to get back to you quickly and take care of you the right way.
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FAQs
Do you offer financing or payment plans?
Yes. At checkout, you can use Shop Pay Installments or Affirm to split your purchase into easy monthly payments. Financing options, including potential 0% interest plans, are shown during checkout and are subject to approval.
Will this part fit my BMW?
Yes. Every product we sell is verified for specific BMW models and chassis. If you want extra peace of mind, you can send us your model, year, or VIN and our team will personally confirm fitment before you order. BMW fitment accuracy is a priority at Legendary Auto Builders.
Are your parts OEM-quality or aftermarket replicas?
We only carry high-quality aftermarket parts that meet or exceed OEM standards. Each product page clearly outlines materials, construction, and finish so you know exactly what you’re getting. We do not sell low-grade replicas or poorly made components.
Where do you ship from and how long does shipping take?
Most in-stock orders ship from our California warehouse within 1–2 business days. Standard U.S. delivery typically takes 3–7 business days depending on location. Made-to-order or specialty items may require additional production time, which is always noted on the product page.
Can I install this myself, or do I need a professional?
Many of our products are designed for direct bolt-on installation and can be installed at home with basic tools. For more complex parts—such as aero components or performance upgrades—we recommend professional installation for best results. If you have questions about install difficulty, just reach out.
What happens if the part doesn’t fit my vehicle?
If there’s a fitment issue due to an error on our end, we’ll make it right. Our team will help resolve the issue quickly, whether that means an exchange or another solution. Fitment accuracy matters to us, and we stand behind the products we sell.
Are your products tested for quality and durability?
Yes. All products go through quality checks and are sourced from trusted manufacturers. We work closely with suppliers and installers to ensure every part meets our performance and durability standards before it ever reaches your car.
Do your products come with a warranty?
Most items include a warranty covering manufacturing defects. Warranty length and coverage details vary by product and are listed on the product page. If you ever have a concern, our support team is here to help.