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Audi A4 B9 S-Line / S4 Sedan Carbon Fiber Boot Lid Spoiler 2017 - 2019

$299.99
  • Fitment verified for YOUR exact year/model/trim
  • Not sure? Ask a Tech (takes 5 min, we confirm before you order)
  • Got install questions? Text a tech who's actually installed this part before, even after it arrives
Shipping

Most orders ship in 3-5 days

K2 Industries  |  SKU: 60801555186
Expert Install SupportExpert Install Support
30-Day Returns30-Day Returns
One Year WarrantyOne Year Warranty
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Every $1 Spent = Entries into our E90 Giveaway

Details

Add a refined aerodynamic detail to the roofline and boot lid of your Audi A4 B9 S-Line or S4 Sedan with this genuine carbon fiber boot spoiler, produced using CNC machining and vacuum moulding with a high-gloss epoxy surface finish. Designed specifically for the A4 B9 and S4 Sedan 4-door body, this single deck boot spoiler complements the factory body lines with a subtle yet purposeful visual upgrade that elevates the rear profile without an overly aggressive appearance. The high-gloss epoxy finish showcases the natural carbon weave and provides lasting protection against UV exposure, moisture, and surface degradation over long-term outdoor and driving use. Adhesive tape is included for a clean, no-drill installation with no permanent modification to the factory boot lid.

Features:
  • Genuine carbon fiber construction – CNC machined and vacuum moulded for precise spoiler geometry, consistent panel quality, and high structural integrity
  • High-gloss epoxy surface finish – showcases the natural carbon weave and resists UV exposure, moisture, and surface degradation over sustained outdoor and driving use
  • Single deck boot spoiler profile – clean, refined design that complements the factory A4 B9 and S4 Sedan body lines without an overly aggressive appearance
  • Adhesive tape included for a clean, no-drill installation with no permanent modification to the factory boot lid
  • Lightweight carbon fiber construction adds negligible weight to the boot lid
Specifications:
  • Condition: 100% Brand New
  • Type: Boot Lid Spoiler
  • Material: Genuine Carbon Fiber
  • Surface Finish: High-Gloss Epoxy Polished
  • Manufacturing Process: CNC Machined · Vacuum Moulded
  • Style: Single Deck Rear
  • Installation Method: Adhesive Tape (included)
  • Position: Rear Boot Lid
  • Purpose: Retrofit / Upgrade
Fitment:
  • Audi A4 B9 S-Line Sedan 4-Door (2017–2019)
  • Audi S4 B9 Sedan 4-Door (2017–2019)
  • Compatible with A4 B9 and S4 factory boot lid only – not compatible with Avant or Allroad body styles
  • Sedan 4-door body style only – not confirmed for Avant or Allroad variants
Contents:
  • 1x Carbon Fiber Boot Lid Spoiler
  • Adhesive Tape for installation included
Benefits:
  • Genuine carbon fiber delivers an authentic carbon weave appearance and superior strength-to-weight ratio over carbon-look ABS or painted plastic alternatives
  • High-gloss epoxy finish maintains the premium carbon surface appearance over prolonged outdoor and driving exposure without fading or yellowing
  • Boot spoiler profile adds a performance-inspired finishing detail to the A4 B9 and S4 Sedan roofline and boot lid without altering the fundamental character of the factory body design
  • Adhesive tape fitment is clean and reversible – no drilling, no boot lid modification, and no permanent commitment to the factory bodywork required
Installation Notes:
  • Adhesive tape supplied – thoroughly clean, degrease, and dry the factory boot lid surface before installation to ensure maximum adhesion strength
  • No drilling or permanent bodywork modification required – fully reversible installation
  • Compatible with A4 B9 S-Line and S4 Sedan factory boot lid only – not confirmed for Avant or Allroad body variants
  • Sedan 4-door body style only – verify body style before ordering
  • Professional installation recommended for optimal spoiler positioning, panel alignment, and finish quality
  • If unsure about compatibility with your specific A4 B9 or S4 variant, contact our team with your year, model, and body style before ordering
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
Warranty:
  • 12-month standard warranty from date of purchase
  • Contact our support team for assistance with any issues

Fitment

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 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.

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Jared D.
I love my new front lip!!
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Victor H.
Pictures don’t do it justice. The ghost out American flag Tesla logo and ghost out American flag Tesla letters look great. Couldn't be more happier. Also great friendly customer service. Would definitely recommend to anyone.
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Francesco S.
Fit perfectly i love it
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Calvin S.
Looks awesome and build quality is great!
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Joshua L. W.
Looks phenomenal and was an easy install!
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Mark C.
Looks great carbon fiber red very nice

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.
Founder photo

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
Founder photo

What You Get With Every Order

Products Selected to Meet Quality & Fitment Standards we Stand Behind.
Products Selected to Meet Quality & Fitment Standards we Stand Behind.
Get Help From People Who Actually Understand Builds & Fitment.
Get Help From People Who Actually Understand Builds & Fitment.
Designed to Resist UV Exposure, Wear, and Everyday Use.
Designed to Resist UV Exposure, Wear, and Everyday Use.
Join Thousands of Builders Who
Trust K2
Join Thousands of Builders Who Trust K2

What Sets K2 Industries Apart?

We don’t just sell parts. We actually give a damn.
Pre-Order Fitment Verification
Damage Replacement
Real Experts Answer the Phone
Post-Purchase Installation Support
Curated Quality
30-Day Returns
K2 Industries
Other Brands
K2 Industries
Other Brands
Pre-Order Fitment Verification
Damage Replacement
Real Experts Answer the Phone
Post-Purchase Installation Support
Curated Quality
30-Day Returns
Add to Cart
GuaranteePerfect fit guaranteed

Frequently Asked Questions

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?

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?

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?

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?

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?

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?

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?

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?

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?

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?

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.

See Why Customers Love K2 Industries