F8X M3/M4 varis carbon fiber undertray diffuser
Pairs well with
F8X M3 / M4 Varis Carbon Fiber Undertray Diffuser
Take your BMW’s aerodynamics and styling to the next level with the F8X M3 / M4 Varis Carbon Fiber Undertray Diffuser. Designed with motorsport DNA, this diffuser delivers aggressive rear-end aesthetics while optimizing airflow for improved stability. Its undertray-style construction provides both form and function, seamlessly integrating with the factory bumper to give your build an unmistakable race-inspired presence. Crafted from premium carbon fiber with a high-gloss finish, this diffuser is built for enthusiasts who demand performance and precision—on the street or at the track.
Product Features
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Precision-engineered for exact fitment on F80 M3 and F82 / F83 M4
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Premium carbon fiber construction with a sleek gloss finish
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Undertray design improves airflow and rear-end downforce
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Aggressive styling inspired by Varis motorsport aero components
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Lightweight and durable, built for both street and track applications
Compatibility
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BMW F80 M3 (2014 – 2018)
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BMW F82 M4 Coupe (2014 – 2020)
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BMW F83 M4 Convertible (2014 – 2020)
Installation
Professional installation is strongly recommended to ensure proper alignment and secure fitment.
F8X M3/M4 varis carbon fiber undertray diffuser
Buy with Confidence
Fitment guaranteed
Engineered for your chassis. Coverage applies with professional installation. If it does not fit, we fix it.
email support
Mon to Fri, 9 am to 5 pm PST at support@cencalmotorsport.com.
Installs and local pickup
Oceanside shop. Text 831-586-0006 to book or reserve in-stock parts. Same day pickup available when in stock.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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About us
Cen-Cal Motorsport isn’t just a parts shop—it’s a lifestyle for BMW enthusiasts who crave performance, precision, and style. We’re all about taking your BMW to the next level with premium parts that bring out the beast under the hood while keeping its luxury vibes on point.
Your BMW isn’t just a car—it’s an experience. Whether you're upgrading for speed, handling, or simply flexing on the road, we’ve got the gear to match your passion.
Why settle for stock? Explore our lineup and see how real quality transforms the drive. Got questions? Hit us up anytime—your ride deserves nothing but the best.