Audi A5 S-Line / S5 B9 Carbon Fiber Rear Diffuser – Prepreg Dry Carbon (2017–2019 Sportback)

The rear end of the B9 A5 and S5 deserves the same attention as the front. This Prepreg Dry Carbon Fiber Rear Diffuser is designed to give your A5 S-Line or S5 Sportback a sharper, more aggressive finish while maintaining a refined OEM+ look.

Precision 3D-designed and CNC molded for accurate fitment, this diffuser follows the factory bumper lines for a seamless upgrade. Constructed using advanced prepreg dry carbon and autoclave curing, it delivers exceptional strength while remaining lightweight. The 3K twill weave is finished in a deep high-gloss clear coat that enhances the carbon pattern and provides long-term UV protection.

Whether you're replacing a damaged diffuser or completing a full carbon aero setup, this piece adds depth, contrast, and a true performance-inspired presence to the rear profile.

Features:

• Prepreg dry carbon fiber construction
• Autoclave cured for superior durability and lightweight performance
• Precision 3D-molded for factory-style fitment
• 3K twill weave carbon finish
• High-gloss UV-resistant clear coat
• Enhances rear-end aggression and sporty appearance

Content:

• 1x Rear diffuser
• Mounting hardware included (adhesive tape & screws)

Fitment:

• 2017-2019 Audi A5 S-Line B9 Sportback
• 2017-2019 Audi S5 B9 Sportback

Specifications:

• Material: Prepreg Dry Carbon Fiber
• Weave: 3K Twill
• Finish: High-Gloss Clear Coat
• Position: Rear Bumper
• Installation: Tape & Screw Mount
• Condition: Brand New
• Warranty: 1 Year

Shipping Information:

• Processing Time: 2-5 business days for warehouse stock items
• Made-to-Order: Please allow 2-4 weeks for shipping if product requires custom manufacturing

Clean from a distance. Aggressive up close. This carbon rear diffuser gives your B9 Sportback the finished, performance-driven look that separates a stock rear end from a fully dialed build.