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

Product Description

Give your 2017-2019 Audi A3/S3 8V.5 S‑Line the aggressive, road‑commanding look that it deserves with this S3‑style large dual exhaust rear diffuser. Designed specifically for the facelift 8V.5 platform, this diffuser replaces your factory rear valance with a bold, motorsport‑inspired piece — featuring a gloss black UV‑stabilized ABS polymer, an aggressive honeycomb design, and large dual‑outlet exhaust openings that demand attention. The included large‑diameter tailpipe exhaust tips (polished stainless steel or black chrome) dramatically enhance the rear‑end impact of your A3 or S3, transforming the look from stock to standout.

The 8V.5 facelift brought sharp LED lighting and revised bumpers to the A3 lineup, but the factory rear diffuser on S‑Line models remains far too tame. 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. An exclusive design will be sure to catch attention and turn heads. If you own a 8V.5 S‑Line A3 and want the sporty S3 look, this diffuser is the perfect upgrade — the honeycomb lower section transforms the rear end and, when paired with the supplied large‑diameter tips, gives your A3 a true performance‑car profile.

⚠️ Critical Fitment Note (Read Carefully): This diffuser is exclusively for Audi A3 8V.5 facelift (2017‑2019) S‑LINE and S3 models ONLY. It will NOT fit Standard (non‑S‑Line) A3, pre‑facelift 8V (2012–2016), or RS3 models. We offer two versions: one for Sedan (Saloon) and one for Sportback (Hatchback) — choose the correct one for your body style. If you have an A3 S‑Line, this diffuser will require exhaust modification to fill the large dual‑tip cutouts and to route the exhaust gases away from the diffuser to prevent heat damage. The included large tailpipe tips feature a dual‑tip/dual‑outlet design that fits aftermarket exhaust systems and accepts tips up to 4" in diameter.

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

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

1. S3 Catback Swap (Recommended) – Find a used S3 catback system (often under $200) and have it installed. This gives you factory‑quality fitment and a slightly sportier sound.

2. Custom Fabrication – Have a qualified exhaust shop modify your existing A3 muffler with custom piping and large quad tips (tips + labor around $200).

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

Complete 1‑Stop Conversion Kit: Includes rear diffuser + large dual tailpipe exhaust tips + self‑tapping screws + 3M VHB tape + installation manual. Optional LED brake light variants are also available for added safety and a racing look.

Aerodynamic Benefits: The sculpted honeycomb design helps smooth airflow, reduces drag, and improves high‑speed stability — a subtle but real performance benefit that many owners notice after installation.

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 / RS3 Style Design with Large Dual Outlets
Give your A3 S‑Line or S3 8V.5 the sharp, race‑bred look of the S3/RS3. The aggressive dual‑outlet honeycomb design and oversized openings create a bold, OEM+ appearance that dramatically enhances the rear profile. The large‑diameter openings are specifically designed to accommodate large 4" round tips or RS3‑style ovals (100x75mm), creating a truly menacing rear profile. The diffuser is crafted of UV‑stabilized ABS polymer to achieve its deep high‑gloss shine and provides an aggressive and sporty style that's sure to set your vehicle apart from the rest .

2. Complete Kit with Large Dual Tailpipe Exhaust Tips
All‑in‑one conversion kit includes the rear diffuser and large‑diameter exhaust tips (polished stainless steel or black chrome). Features a dual‑tip/dual‑outlet design that fits factory and most aftermarket exhaust systems and is designed to accept exhaust tips up to 4" in diameter. The diffuser comes with or without stainless steel quad tailpipes. Choose between polished stainless steel or black‑chrome finishes to match your personal style. Some RS3‑style variants also include an LED brake light for enhanced visibility and a racing aesthetic.

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. 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 a high‑end aesthetic .

4. Direct Fitment for 8V.5 S‑Line (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. Simply remove your currently installed valance, line up all tabs, and lightly press the diffuser in place until the tabs click into position. Make sure all tabs are lined up and lightly press the diffuser in place until the tabs click into position. Self‑tapping screws are provided for additional security. However, for A3 S‑Line owners, exhaust modification is required to fill the large quad‑tip cutouts. The product will arrive with a protective film — do not remove the protective film until you are certain the product fits, as removal will void the return policy.

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 holographic verification sticker confirms authenticity — removal of the sticker will void returns, so only remove once you are certain the product fits.

Specifications

What's in the Box

• 1 × S3/RS3‑style rear diffuser 

• 2 × Large dual tailpipe exhaust tips 

Installation & Safety Guide

Professional installation is strongly recommended — do not attempt DIY unless you are a qualified technician.

Installation Time: 2‑3 hours | Difficulty: Advanced

Important Safety Notice: When working underneath your vehicle, always use approved jack stands. Never work under a car that is only supported by a floor jack.

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 the kit include large exhaust tips?

A: Yes! The complete kit includes large‑diameter dual tailpipe exhaust tips (polished stainless steel or black chrome), 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. However, self‑tapping screws are recommended in corners and tabs for best fitment. The 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