2017–2019 Audi A5 S-Line / S5 B9 Sportback Rear Diffuser – Pre-Preg Dry Carbon Fiber
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*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
2017–2019 Audi A5 S-Line / S5 B9 Sportback Rear Diffuser – Pre-Preg Dry Carbon Fiber
Give the rear end of your Audi A5 S-Line or S5 B9 Sportback a sharper, more aggressive finish with this pre-preg dry carbon fiber rear diffuser. Precision-molded to follow the factory bumper lines, it adds depth and contrast for a true performance-inspired presence while keeping a refined factory look.
Build
- Material: Pre-preg dry carbon fiber in a 3K twill weave — the resin is pre-impregnated into the weave under controlled conditions before autoclave curing, giving exceptional strength, consistent weave, and a lighter finished component than standard wet carbon
- Manufacturing: Autoclave cured, precision 3D-designed and CNC moulded for accurate fitment
- Surface finish: Deep high-gloss clear coat that showcases the 3K twill weave and provides long-term UV protection
- Configuration: Single-piece diffuser for the lower rear bumper
Design & Aerodynamics
- Aggressive stance: Diffuser profile adds depth and visual weight to the lower rear for a more planted, performance-focused rear end
- Carbon aesthetic: Refined 3K twill dry carbon weave and high-gloss clear coat deliver premium contrast against the factory paint
- Factory-style integration: Precision-molded to the contours of the factory rear bumper for a clean, seamless fit
Fitment
- 2017–2019 Audi A5 S-Line B9 Sportback
- 2017–2019 Audi S5 B9 Sportback
- Fits the A5 S-Line and S5 factory rear bumper only — not compatible with the standard non-S-Line A5 or aftermarket bumpers
Package Contents
- 1 × pre-preg dry carbon fiber rear diffuser
- Adhesive tape and mounting screws for installation
Installation
- Two mounting options: Fits using the included adhesive tape and mounting screws for a secure, long-lasting fit
- Drilling required for screw mount: Screw fixing pierces the bumper, so if you use the screw option this is a permanent modification rather than a reversible fit
- Surface prep: If using adhesive tape, thoroughly clean, degrease, and dry the rear bumper before fitting to ensure maximum adhesion
- Alignment: Dry-fit and check the diffuser sits centred and even across the bumper before committing to either method
- Professional installation recommended for correct positioning, panel alignment, and a clean finish
Before You Install
- Confirm your car is an A5 S-Line or S5 B9 Sportback (2017–2019) before ordering — this will not fit the standard non-S-Line A5
- Screw mounting is permanent — it requires drilling into the bumper, so decide on your method and confirm placement before starting
- Take care when parking rear-in — lower rear panels sit close to kerbs and parking blocks
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.