Upgrade the rear of your 2017-2019 Audi A5 / S5 with this KB Rear Diffuser. Crafted from high-quality ABS plastic and primer-ready, this aggressive rear diffuser adds a motorsport-inspired look and enhances the rear fascia with a sporty, structured finish.
What's Included:
- KB Style Rear Diffuser (primer-ready or carbon hydrodip)
- Mounting hardware & hardware kit
Key Features:
- Material: High-quality ABS plastic — primer-ready, paint to match or custom finish
- Designed for 2017-2019 Audi A5 / S5 using factory mounting points; may require fitment and trimming adjustments based on vehicle trim options — professional installation recommended
- Bolt-on installation — no cutting of the factory bumper required for standard fitment
Fitment: 2017-2019 Audi A5 / S5 — B9. Coupe and Sportback body styles. Fits A5 and S5 models — not compatible with RS5.
The Carbon Fiber variant features a premium hydrographic carbon fiber finish (hydrodipped), pre-applied over ABS plastic — no painting required.
🕒 Made to Order — 3-4 Weeks from Production to Delivery
This rear diffuser is custom-manufactured to order in our production workshop. Production begins 24 hours after your order is placed — you have a 24-hour window to modify or cancel. Once production begins, orders cannot be modified or cancelled. Typical timeline: 3-4 weeks from production start to delivery at your door. You'll receive a tracking number as soon as your diffuser ships.
Optional Exhaust Tips Upgrade
Complete your rear-end refresh by pairing this diffuser with matching stainless steel exhaust tips. Available in two finishes to complement your build:
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With Silver Tips — Polished stainless steel, mirror finish. OEM+ appearance that blends seamlessly with factory exhaust setups.
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With Black Tips — Powder-coated stainless steel with matched internal polish. Aggressive stealth appearance for blacked-out builds.
Tips ship as a matched pair with slip-on collars sized to fit factory exhaust piping. Installation is bolt-on / slip-on — no cutting or welding required for most factory exhaust configurations.
Select "With Silver Tips" or "With Black Tips" above to add tips to your diffuser order. Choose "No Tips" if you're keeping your existing exhaust setup.
