2017-2019 For Audi A3 S3 8V.5 S line rear diffuser and tailpipe

 Product Description

Upgrade the rear profile of your 2017‑2019 Audi A3/S3 8V.5 S‑Line or S3 with this S3 style rear diffuser complete with dual/quad tailpipe exhaust tips. Designed for the facelift 8V.5 platform (2017‑2019), this diffuser replaces your factory rear valance with the aggressive, sporty look of the S3/RS3 — featuring a gloss black UV‑stabilized ABS polymer construction, aggressive honeycomb design, and dual‑outlet exhaust openings that dramatically enhance the visual impact of your rear end [8†L13-L19].

This diffuser was engineered and designed in‑house to add a more aggressive appearance to the rear of your vehicle that matches with the factory appeal of your Audi [7†L13-L16]. An exclusive design will be sure to catch attention and turn heads. The honeycomb lower section transforms the rear end and, when combined with properly installed quad tips (requires cutting or a full S3 catback swap), gives your A3 S‑Line a true performance‑oriented, race‑inspired look.

⚠️ Critical Fitment Note (Read Carefully): This diffuser is exclusively for Audi A3 8V.5 facelift (2017‑2019) S‑LINE / S3 models ONLY. It will not fit Standard (non S‑Line) or RS3 models. For 8V.5 A3 S‑Line models, this diffuser will require exhaust modification to fill the dual/quad‑tip cutouts [7†L30-L32]. If you are upgrading from a single‑side exhaust A3 S‑Line, you will need to modify your exhaust system or install a full S3 catback system to achieve the proper outlet placement and fitment [6†L12-L15]. If you have an 8V S3, the diffuser will bolt on and line up with your factory quad outlets.

Pro Tip – Quad‑Exhaust Options (For A3 S‑Line Owners)

There are two proven approaches to get quad tips working with this diffuser:

1. S3 Catback Swap (Recommended) – Find a used S3 catback (often under $200) and have it installed. This gives you factory‑quality fitment and a slightly sportier sound [6†L12-L15].

2. Custom Fabrication – Have a shop modify your existing A3 muffler with custom piping and quad tips (tips + labor around $200) [6†L12-L15].

The diffuser itself is direct‑fit; the complexity is in the exhaust system.

Complete 1‑Stop Conversion Kit: Includes rear diffuser + dual/quad exhaust tips + self‑tapping screws + 3M VHB tape + installation manual.

Aerodynamic Benefits: Rear diffusers are functional and stylish upgrades that enhance your car’s rear‑end while improving aerodynamic efficiency. By managing airflow underneath your car, diffusers reduce turbulence and drag at high speeds, making for a much smoother ride [2†L7-L10].

Serving both individual enthusiasts (B2C) and businesses (B2B):
✅ US warehouse for fast shipping
✅ CE certified for quality assurance
✅ 1‑year warranty for peace of mind
✅ Factory direct – competitive pricing
✅ Dropshipping & wholesale programs available
✅ Custom OEM/ODM orders welcome

5 Key Features

1. Aggressive S3 Style Design – Factory Fit for S‑Line / S3 Bumpers
Give your A3/S3 8V.5 S‑Line the sharp, race‑inspired look of the S3/RS3. The aggressive dual‑outlet honeycomb design and sculpted lines create a bold, OEM+ appearance that dramatically enhances the rear profile. This diffuser was engineered specifically for the facelift 8V.5 S‑Line / S3 bumper, adding more aggression to the rear of your car while matching the factory appeal of your Audi [7†L13-L15]. An exclusive design only adds a deeper high‑gloss shine and provides an aggressive and sporty style that’s sure to set your vehicle apart from the rest [11†L14-L17].

2. Complete Kit with Dual/Quad Tailpipe Exhaust Tips
All‑in‑one conversion kit includes the rear diffuser and dual/quad exhaust tips — everything you need for a full S3 style rear transformation. Features a dual‑tip/dual‑outlet (quad‑tip capable) design that fits factory and most aftermarket exhaust systems and is designed to accept exhaust tips up to 4" in diameter [7†L20-L21]. The diffuser is available with or without stainless steel quad tailpipes [14†L13-L14]. Choose between polished stainless steel or black‑chrome finishes to match your personal style. Some RS3‑style variants also come with an LED brake light for enhanced safety and a racing look.

3. Premium Gloss Black UV‑Stabilized ABS Construction (TÜV Certified)
Manufactured from high‑quality UV‑stabilized ABS polymer — the same material used in OEM bumpers and body parts. The deep high‑gloss black finish is UV‑protected to prevent fading, yellowing, or bubbling from harsh sunlight. No painting required — ready to install out of the box, or it can be repainted to match your vehicle if a custom color is desired [13†L17-L18]. This product has been TUV MATERIALGUTACHTEN certified, verifying material quality and safety for road use. A premium pre‑preg dry carbon fiber version is also available for those seeking ultimate weight savings and weave aesthetics. The diffuser is crafted from a UV‑stabilized ABS polymer to achieve its deep high‑gloss shine [11†L15-L17].

4. Direct Fitment for 8V.5 S‑Line / S3 (2017‑2019)
Engineered for a perfect OEM+ fit onto Audi A3 8V.5 S‑Line / S3 rear bumpers using factory mounting locations. Installs with no drilling, cutting, or modification of any kind required to the bumper [7†L22-L24]. Simply remove your currently installed valance, line up all tabs, and lightly press the diffuser in place until the tabs click into position. The diffuser uses factory mounting hardware to ensure a secure fit [7†L22-L26]. However, for 8V.5 A3 S‑Line models, exhaust modification is required to fill the quad‑tip cutouts [7†L30-L32].

5. CE & TUV MATERIALGUTACHTEN Certified + EPR Compliant
This diffuser is CE certified, meeting European safety and quality standards for automotive aftermarket parts. It has also received TUV MATERIALGUTACHTEN certification, verifying material quality and safety for road use. The product also complies with EPR (France/Germany) environmental regulations for packaging and waste management. The product arrives with a protective film — do not remove the protective film until you are certain the product fits, as removal will void the return policy.

Specifications

What's in the Box

• 1 × S3‑style rear diffuser 

• 2 × Dual/quad tailpipe exhaust tips

 Shipping & Returns

 20-Year Specialization: 158000+ bumpers installed since 2006.

• Shipping: Worldwide delivery. In-stock US orders ship within 1-3 business days. International orders: 22-25 business days. Free shipping & no sales tax(Continental US only).

• Returns: If the kit does not fit, arrives damaged, or you are unsatisfied, return it within 15 days as long as it remains uninstalled and unpainted – free return shipping for genuine fitment issues. Combined with our 1-year warranty, this risk-free policy gives body shops, resellers, and DIYers complete confidence when ordering For Audi facelift kits. Contact us for wholesale pricing and US stock availability.

• Warranty: 1-year warranty against manufacturing defects.

Frequently Asked Questions

Q1: Will this fit my 2017‑2019 Audi A3 S‑Line or S3?

A: Yes, if your vehicle is a 8V.5 facelift (2017‑2019) with the S‑Line sport bumper (or an S3). This diffuser will NOT fit Standard (non S‑Line) A3 or RS3 models. Contact us with your VIN for confirmation.

Q2: How do I know if my A3 has S‑Line or Standard?

A: The S‑Line exterior package includes sportier front/rear bumpers, side skirts, and S‑Line badging on the front wings. If your A3 has a smooth, non‑aggressive rear bumper, you have the Standard (non S‑Line) bumper.

Q3: Does this kit include exhaust tips?

A: Yes! The complete kit includes dual/quad tailpipe exhaust tips, self‑tapping screws, and 3M VHB tape — a complete 1‑stop solution for your rear‑end transformation.

Q4: Does the diffuser require painting?

A: No. It comes in a premium high‑gloss black UV‑stabilized finish — ready to install out of the box. UV‑protection prevents fading and yellowing. If you decide to paint it, primer must be used first.

Q5: Is drilling required for installation?

A: No drilling, cutting, or modification of any kind is required to the bumper when using factory mounting locations [7†L22-L24]. However, self‑tapping screws are recommended in corners and tabs for best fitment. This product requires the removal of the original diffuser; self‑tapping screws are needed to secure fitment of the new diffuser.

Q6: Is professional installation required?

A: Yes, strongly recommended. Professional installation by someone with aftermarket product experience is highly advised . The rear bumper must be removed to install this diffuser properly .