2017–2019 Audi A5 S-Line / S5 B9 Front Bumper Diffuser Lip – Carbon Fiber
2017–2019 Audi A5 S-Line / S5 B9 Front Bumper Diffuser Lip – Carbon Fiber
Make a commanding front-end statement on your Audi A5 S-Line or S5 B9 with this carbon fiber front bumper diffuser lip. Spanning 180 cm for full-width lower coverage, it adds dramatic visual width and a pronounced ground-hugging forward presence — a comprehensive front-end transformation rather than a subtle trim addition.
Build
- Material: Genuine carbon fiber, manufactured for precise lip geometry, consistent panel surface, and an authentic weave appearance over carbon-look ABS or fiberglass alternatives
- Surface finish: High-gloss epoxy-polished and UV-protected finish that showcases the natural carbon weave and resists UV exposure, moisture, and road debris through sustained outdoor and driving use
- Configuration: Single-piece full-width diffuser lip for the lower front bumper
- Panel width: 180 cm across
Design & Finish
- Aggressive stance: Lip profile adds visual width and a lower, ground-hugging forward presence for a more commanding, track-inspired front end
- Full-width coverage: The 180 cm span covers the complete lower front bumper for an integrated finish with no exposed factory sections
- Carbon aesthetic: Directional weave and gloss finish complement the sporty S-Line and S5 bodywork for a coordinated, motorsport-grade look
Fitment
- 2017–2019 Audi A5 S-Line (B9)
- 2017–2019 Audi S5 (B9)
- Fits the A5 S-Line and S5 factory front bumper only — not compatible with the standard non-S-Line A5, aftermarket bumpers, or non-B9 configurations
- Confirm your body style and front bumper configuration before ordering
Package Contents
- 1 × carbon fiber front bumper diffuser lip
- Installation hardware
Installation
- Surface prep: Thoroughly clean and degrease the front bumper before installation to ensure correct panel seating and secure fitment
- Alignment: Dry-fit and check the lip sits centred and even across the bumper, with consistent panel gaps on both sides, before final fitting
- Professional installation strongly recommended — a panel of this width requires careful positioning to achieve symmetrical alignment and a clean finish
- Plan for a second pair of hands during fitting given the panel's full-width span
Before You Install
- Confirm your car is an A5 S-Line or S5 B9 (2017–2019) before ordering — this will not fit the standard non-S-Line A5
- Verify your factory front bumper is unmodified before ordering
- Front lips sit low and are exposed to kerbs, driveway ramps, and road debris — take care when parking nose-in
2017–2019 Audi A5 S-Line / S5 B9 Front Bumper Diffuser Lip – Carbon Fiber
Make a commanding front-end statement on your Audi A5 S-Line or S5 B9 with this carbon fiber front bumper diffuser lip. Spanning 180 cm for full-width lower coverage, it adds dramatic visual width and a pronounced ground-hugging forward presence — a comprehensive front-end transformation rather than a subtle trim addition.
Build
- Material: Genuine carbon fiber, manufactured for precise lip geometry, consistent panel surface, and an authentic weave appearance over carbon-look ABS or fiberglass alternatives
- Surface finish: High-gloss epoxy-polished and UV-protected finish that showcases the natural carbon weave and resists UV exposure, moisture, and road debris through sustained outdoor and driving use
- Configuration: Single-piece full-width diffuser lip for the lower front bumper
- Panel width: 180 cm across
Design & Finish
- Aggressive stance: Lip profile adds visual width and a lower, ground-hugging forward presence for a more commanding, track-inspired front end
- Full-width coverage: The 180 cm span covers the complete lower front bumper for an integrated finish with no exposed factory sections
- Carbon aesthetic: Directional weave and gloss finish complement the sporty S-Line and S5 bodywork for a coordinated, motorsport-grade look
Fitment
- 2017–2019 Audi A5 S-Line (B9)
- 2017–2019 Audi S5 (B9)
- Fits the A5 S-Line and S5 factory front bumper only — not compatible with the standard non-S-Line A5, aftermarket bumpers, or non-B9 configurations
- Confirm your body style and front bumper configuration before ordering
Package Contents
- 1 × carbon fiber front bumper diffuser lip
- Installation hardware
Installation
- Surface prep: Thoroughly clean and degrease the front bumper before installation to ensure correct panel seating and secure fitment
- Alignment: Dry-fit and check the lip sits centred and even across the bumper, with consistent panel gaps on both sides, before final fitting
- Professional installation strongly recommended — a panel of this width requires careful positioning to achieve symmetrical alignment and a clean finish
- Plan for a second pair of hands during fitting given the panel's full-width span
Before You Install
- Confirm your car is an A5 S-Line or S5 B9 (2017–2019) before ordering — this will not fit the standard non-S-Line A5
- Verify your factory front bumper is unmodified before ordering
- Front lips sit low and are exposed to kerbs, driveway ramps, and road debris — take care when parking nose-in
- Fitment verified for YOUR exact year/model/trim
- Not sure? Call +1 772-277-2495 for a real specialist to help you order
- Got install questions? Text a tech who's actually installed this part before, even after it arrives
FREE Shipping
2017–2019 Audi A5 S-Line / S5 B9 Front Bumper Diffuser Lip – Carbon Fiber is backordered and will ship as soon as it is back in stock.
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Wrong fit or arrives damaged? Free replacement or refund
30,000+ Happy Customers
30-Day Returns
One Year Warranty
Install Type
Bolt-on styling
Install Time
About 30–90 min
Before Install
Test-fit first
Finish
Usually no paint
Details
Details
2017–2019 Audi A5 S-Line / S5 B9 Front Bumper Diffuser Lip – Carbon Fiber
Make a commanding front-end statement on your Audi A5 S-Line or S5 B9 with this carbon fiber front bumper diffuser lip. Spanning 180 cm for full-width lower coverage, it adds dramatic visual width and a pronounced ground-hugging forward presence — a comprehensive front-end transformation rather than a subtle trim addition.
Build
- Material: Genuine carbon fiber, manufactured for precise lip geometry, consistent panel surface, and an authentic weave appearance over carbon-look ABS or fiberglass alternatives
- Surface finish: High-gloss epoxy-polished and UV-protected finish that showcases the natural carbon weave and resists UV exposure, moisture, and road debris through sustained outdoor and driving use
- Configuration: Single-piece full-width diffuser lip for the lower front bumper
- Panel width: 180 cm across
Design & Finish
- Aggressive stance: Lip profile adds visual width and a lower, ground-hugging forward presence for a more commanding, track-inspired front end
- Full-width coverage: The 180 cm span covers the complete lower front bumper for an integrated finish with no exposed factory sections
- Carbon aesthetic: Directional weave and gloss finish complement the sporty S-Line and S5 bodywork for a coordinated, motorsport-grade look
Fitment
- 2017–2019 Audi A5 S-Line (B9)
- 2017–2019 Audi S5 (B9)
- Fits the A5 S-Line and S5 factory front bumper only — not compatible with the standard non-S-Line A5, aftermarket bumpers, or non-B9 configurations
- Confirm your body style and front bumper configuration before ordering
Package Contents
- 1 × carbon fiber front bumper diffuser lip
- Installation hardware
Installation
- Surface prep: Thoroughly clean and degrease the front bumper before installation to ensure correct panel seating and secure fitment
- Alignment: Dry-fit and check the lip sits centred and even across the bumper, with consistent panel gaps on both sides, before final fitting
- Professional installation strongly recommended — a panel of this width requires careful positioning to achieve symmetrical alignment and a clean finish
- Plan for a second pair of hands during fitting given the panel's full-width span
Before You Install
- Confirm your car is an A5 S-Line or S5 B9 (2017–2019) before ordering — this will not fit the standard non-S-Line A5
- Verify your factory front bumper is unmodified before ordering
- Front lips sit low and are exposed to kerbs, driveway ramps, and road debris — take care when parking nose-in
Our Guarantee
Our Guarantee
Warranty Assurance:
At K2 Industries, your satisfaction is our priority, and we stand behind the quality of our products. Here's a brief overview of our warranty:
Defect Coverage:
If you find a defect after receiving your order, get in touch with us. We're committed to resolving the issue, whether it involves a replacement, repair, or refund.
Installation Note:
Please inspect your purchase before installation. Unfortunately, damages post-installation are not covered, so ensure everything looks good beforehand.
Claims Made Simple:
Need to make a claim? Reach out to us at support@k2-industries.com. We're here to assist you. Just keep your original packaging and documentation handy.
Your Satisfaction Matters:
Your trust in K2 Industries is appreciated. We're dedicated to ensuring your satisfaction with our quality automotive parts.
Shipping & Returns
Shipping & Returns
Shipping Information:
At K2 Industries, we strive to provide a seamless and efficient shopping experience for automotive enthusiasts like you. Our commitment is to deliver high-quality parts to your doorstep with the utmost care.
Fast and Reliable Shipping:
Many of our products are stocked in our local warehouse, ensuring swift processing and delivery. Orders placed for these items typically ship within 2-5 business days, allowing you to get your parts in no time.
Extended Selection, Global Reach:
To offer you a broader range of automotive parts, some items are sourced from trusted suppliers around the world. While these products might have a slightly longer processing time, we assure you that the wait is worth it for the exceptional quality and value they bring.
Shipping Transparency:
For products shipped internationally, we provide estimated delivery times on the product page. Rest assured, we are continually working to optimize our supply chain and minimize any potential delays.
Combined Shipments:
To streamline your shopping experience, if your order includes items from both our local warehouse and international suppliers, they may be shipped separately. You will receive separate tracking information for each shipment.
Questions or Concerns?
If you have any questions about shipping or would like assistance tracking your order, our dedicated customer support team is here to help. Feel free to reach out to us at support@k2-industries.com.
You can also track your order here
Thank you for choosing K2 Industries for your automotive needs. We appreciate your trust in us.
FAQs
Will this lip or diffuser fit my exact vehicle?
It's designed for the fitment listed on this page. If your model has multiple bumper options (M Sport, GT, RS), confirm which one you have before ordering — these are specific to the bumper style.
Does this ship painted or unpainted?
Most ship unpainted (raw composite, primer, or raw carbon). Some carbon fiber lips ship pre-finished with clear coat. The spec sheet on this page tells you what to expect.
Can I install this myself?
Yes — most lips and diffusers are bolt-on or 3M tape-on, 30-90 minutes with basic tools. Some require drilling, which is permanent, so check the spec sheet for the mounting method before you start.
How does shipping work?
Most lips and splitters ship standard parcel (UPS/FedEx). Larger one-piece splitters may ship freight. Either way, shipping covers insured delivery and damage replacement.
2017–2019 Audi A5 S-Line / S5 B9 Front Bumper Diffuser Lip – Carbon...
The K2 Difference
- • Built by enthusiasts who've made every fitment mistake you're afraid of. Now we verify parts for 30,000+ builds a year with zero wrong-part claims.
- • Real specialists answer your questions in minutes, not chatbots reading scripts. We've built the same cars you're building.
- • Freight damage, wrong parts, installation question, we handle it so you don't deal with suppliers or shipping companies.
Built By Someone Who's Been There
Max, the Owner, started in his garage making E36 M3 tail lights in his own oven.
- • Started modifying cars before he could legally drive them
- • Spent years hunting down parts that actually fit and don't suck
- • Made the same fitment mistakes you're afraid of
What You Get With Every Order
What Sets K2 Industries Apart?
Perfect fit guaranteedFrequently Asked Questions
How do I know this will actually fit my car?
How do I know this will actually fit my car?
Every part listing shows compatible years, models, and trims. But here's the thing—trim packages and factory options can be confusing. If you're not 100% certain, text us at 772-277-2495 with your VIN or photos of your car. We'll verify fitment before you order so you're not stuck with an $800 part that doesn't fit. We've done this for 30,000+ builds. We've seen every weird trim combo and factory option. Takes us 2 minutes to verify, saves you weeks of headaches.
What if the part arrives damaged or is the wrong item?
What if the part arrives damaged or is the wrong item?
We handle it. You don't fight with freight companies or file claims. Text us photos within 48 hours of delivery. If it's damaged or wrong, we ship a replacement immediately. You're not waiting 6 weeks for a freight claim to process. We eat the cost, not you. This is why we package everything like it's going to war. But if something slips through, we fix it ASAP. No forms, no back-and-forth, no "file a claim and wait." Just text us and we handle it.
Can I install this myself or do I need a shop?
Can I install this myself or do I need a shop?
Depends on the part. Emblems, front lips, some spoilers, bolt-on, DIY-friendly, you can do it in your driveway with basic tools. Full bumpers, hoods, wide-body kits, possible for experienced DIYers but most people take them to a shop for paint and install. Check the product description for installation difficulty. If you're unsure, text us. We'll be honest about whether you can handle it or if you should take it to a pro. We'd rather you know upfront than get frustrated halfway through.
What's your return policy if it doesn't fit or I don't like it?
What's your return policy if it doesn't fit or I don't like it?
30 days, unused parts in original packaging. You pay return shipping unless we sent the wrong part or it arrived defective. Once you install it, modify it, paint it, or mount it, we can't take it back. That's why we push so hard on verifying fitment BEFORE you order. We don't want you stuck with something you can't use. Text us before ordering if you're unsure. We'll confirm fitment so you never have to worry about returns.
Do you offer financing?
Do you offer financing?
Yes. Affirm and Shop Pay available at checkout for orders over $50. Split payments over 3-12 months depending on order size. No hard credit check to see your options. Most people use this for big-ticket items like body kits, suspension setups, or wheel/tire packages. Rates vary based on credit. You see the monthly payment before you commit. Makes it easier to build now instead of waiting months to save up.
What if I have questions after I receive the part?
What if I have questions after I receive the part?
Text 772-277-2495. We don't disappear after you buy. Fitment questions, installation issues, "does this bolt go here" questions... we'll walk you through it. We've installed these parts ourselves or helped hundreds of people install them. You're not getting transferred to a call center in the Philippines. You're texting someone who's actually installed your part before. If we can't help remotely, we'll recommend a local shop that knows these parts.
Why should I buy from K2 instead of eBay/Amazon/other sites?
Why should I buy from K2 instead of eBay/Amazon/other sites?
eBay and Amazon sellers don't answer fitment questions. They don't verify your VIN before shipping. They don't handle freight damage claims for you. If something goes wrong, you're filing disputes and waiting weeks. We're builders selling to builders. We verify fitment before you order. We handle damage claims same-day. We answer texts in minutes. We're not the cheapest, but you're not gambling $800 on whether a part fits. You're paying for support, verification, and someone who cares if your build goes sideways.
What does your warranty cover?
What does your warranty cover?
1 year against manufacturing defects: cracking, warping, paint peeling, hardware failure, fitment issues caused by the part being made wrong. Does NOT cover installation damage (you cracked it bolting it on), road damage (curb rash, rock chips), or normal wear. If it breaks because we made it wrong, we replace it free. If it breaks because you hit a parking block, that's on you. We're fair about it. Send photos and we'll tell you honestly if it's covered.
Shipping
Do you ship overseas?
Do you ship overseas?
Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.
How much does shipping cost and when will I see the total?
How much does shipping cost and when will I see the total?
Depending on where you're located, small parts can ship free. Large parts like bumpers, hoods, and body kits require freight shipping. Uou'll see the exact cost at checkout before you pay. Freight usually runs $150-$300 depending on size and your location. We know it's expensive. We negotiate the best rates we can. If you're ordering multiple large parts, text us. We can sometimes combine shipping and save you money. We're not hiding fees in the final step. What you see at checkout is what you pay.
How long will it take to receive my order?
How long will it take to receive my order?
It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.
