2017-2019 For A5 B9 S-Line Carbon Diffuser - Dual Exhaust+K-Light | US Stock

🔥2017-2019 US Stock Carbon Fiber Rear Diffuser with Dual Exhaust K-Style Light for Audi A5 B9 Sline | Upgrade Rear Valance
Transform your 2017-2019 Audi A5 B9 S-Line with the US Stock Carbon Fiber Rear Diffuser with Dual Exhaust K-Style Light — the ultimate all-in-one rear valance upgrade that blends premium carbon fiber aesthetics, dynamic lighting effects and sporty exhaust styling. Engineered exclusively for the B9 S-Line chassis, this diffuser is crafted from high-grade twill weave carbon fiber, features integrated dual exhaust cutouts and eye-catching K-style LED lights, and is stocked in US warehouses for fast domestic delivery. It’s the top choice for B9 S-Line A5 owners wanting to elevate their ride’s rear-end appeal with a professional, head-turning transformation.

Key Features

✅ B9 S-Line Exclusive Fit for 2017-2019 A5 Models
Precision-crafted for the 2017-2019 B9 S-Line platform, this carbon fiber rear diffuser is 100% compatible with all Audi A5 B9 S-Line. Using 3D laser scanning of OEM B9 S-Line rear bumper data, it aligns flawlessly with factory contours, mounting points and exhaust positions — no gaps, no trimming, no forced adjustments.
✅ Premium 3K Twill Carbon Fiber Construction
Crafted from hand-laid twill weave carbon fiber, the diffuser delivers superior strength-to-weight ratio. The surface is finished with a 2-layer UV-stabilized gloss clear coat that resists fading, yellowing and oxidation, preserving a showroom-worthy shine for years. Unlike cheap carbon-look alternatives, this a5 b9 s-line carbon fiber rear diffuser boasts authentic carbon fiber texture and motorsport-grade durability, withstanding road debris and extreme weather conditions.
✅ Dual Exhaust + K-Style LED Light Combo
Designed with precision-cut dual exhaust openings, amplifying the B9 S-Line’s sporty stance while ensuring smooth exhaust flow. Integrated K-style LED lights with red running light and brake light modes add dynamic visual appeal, making your vehicle stand out day and night. The dual exhaust k-style light carbon diffuser creates a cohesive rear-end look that outperforms standalone diffusers or lighting upgrades.
✅ Direct Replacement Rear Valance Upgrade 
Designed for true plug-and-play convenience, the diffuser replaces the factory rear valance using original mounting holes and hardware to achieve seamless fit that mirrors OEM components. Installation takes just 1-2 hours for professionals or experienced DIYers, requiring only standard auto tools — no drilling, cutting or welding is needed. The precision-engineered design preserves vehicle integrity and resale value, making it ideal for both leaseholders and modification enthusiasts.
✅ US Warehouse Stock & Fast Domestic Shipping
Stocked in multiple US warehouses for immediate fulfillment: orders process within 1-2 business days, with delivery in 3-7business days to all 48 US states. Full tracking information is provided, and shock-absorbent packaging protects the carbon fiber diffuser and LED lights from transit damage. No customs delays, hidden fees or long lead times — get your a5 b9 s-line rear valance upgrade installed in no time.

Why Choose Our Carbon Fiber Rear Diffuser with Dual Exhaust K-Style Light? 
When upgrading your 2017-2019 Audi A5 B9 S-Line, premium quality, dynamic styling, and convenience are non-negotiable — our carbon fiber rear diffuser with dual exhaust and K-style light stands out as the top choice for discerning B9 S-Line owners because it is crafted from 100% authentic twill weave carbon fiber with autoclave curing for motorsport-grade durability and luxury aesthetics that cheap imitations can’t match, is precision-engineered via 3D laser scanning of OEM B9 S-Line components to ensure seamless fit with zero gaps or modifications and delivers a complete rear valance upgrade in one package, integrates dual exhaust cutouts and K-style LED lights to enhance both sporty performance vibes and dynamic visual appeal without extra purchases.
🔧 15-Year Specialization: 132,387+ bumpers installed since 2010.
🚚 Next-Day US Delivery: 90% of orders ship from our West Coast warehouse within 24 hours. Free shipping & no sales tax(Continental US only).
🛡️ Zero-risk purchase:
14-day return: return label is provided for easy exchange.
Price match guarantee: Found a cheaper one? We will match the price and provide an additional 5% discount