2020-2024 For Audi A4 S4 B9.5 Audi S4 Style A4 Diffuser With Tailpipe Exhaust Tips

Product Description

Overview

Transform the rear profile of your 2020–2024 Audi A4 B9.5 S‑Line with this S4 style rear diffuser. Designed specifically for the facelifted B9.5 platform (2020–2024), this complete conversion kit replaces your factory rear valance with the aggressive, sporty look of the S4 — featuring a gloss black UV‑stabilized ABS polymer construction, a sculpted OEM+ design, and a complete set of dual tailpipe exhaust tips.

The B9.5 facelift brought sharper styling, revised bumpers, and integrated reflectors to the A4 lineup [2†L36-L38]. This S4‑inspired rear diffuser builds on that foundation, giving your A4 S‑Line a more commanding presence from every angle while improving rear‑end aerodynamics. Unlike the restrictive, boring factory plastic valance, this S4‑style diffuser opens up the rear, providing a much more flowing appearance that perfectly complements the car's natural lines. The rear diffuser is an important part of the rear bumper — it not only serves as an aesthetically pleasing component but also a functional one, as it is used to improve the aerodynamics of your vehicle by changing the way air flows around the bumper [2†L29-L33].

Critical Fitment Note: This diffuser is exclusively for Audi A4 B9.5 S‑Line models (2020–2024). It will NOT fit Non‑S‑Line (standard) A4 bumpers or pre‑facelift B9 (2015–2019) models. The rear bumpers are different between B9 and B9.5, making diffuser compatibility non‑interchangeable without verification. You must have the S‑Line exterior package to install this diffuser.

📌 Complete Conversion Kit: Includes rear diffuser, dual tailpipe exhaust tips, self‑tapping screws, 3M VHB tape, and installation manual.

Aerodynamic Benefits: The sculpted design channels airflow, reduces turbulence, and enhances rear‑end stability at higher speeds.

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 S4 Style Design for S‑Line Bumpers
Give your A4 B9.5 S‑Line the sharp, sporty look of the S4. The aggressive dual‑outlet design and sculpted lines create a bold, OEM+ appearance that dramatically enhances the rear profile. This diffuser was engineered and designed in‑house specifically for the B9.5 S‑Line bumper, adding a more aggressive appearance to the rear of your vehicle that matches with the factory appeal of your Audi . The exclusive design provides an aggressive and sporty style that's sure to set your vehicle apart from the rest .

2. Complete Kit with Dual Tailpipe Exhaust Tips
All‑in‑one conversion kit includes the rear diffuser and dual exhaust tips — everything you need for a full S4 style rear transformation. Features a dual‑outlet design (left + right) to fit the factory and most aftermarket exhaust systems and is designed to accept exhaust tips up to 4" in diameter . Choose between polished stainless steel or black‑chrome finishes to match your personal style.

3. Premium Gloss Black UV‑Stabilized ABS Construction
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, ensuring your diffuser looks showroom‑fresh for years. No painting required — ready to install out of the box. A premium pre‑preg dry carbon fiber version is also available for those seeking ultimate weight savings and weave aesthetics.

4. Direct Fitment for B9.5 S‑Line (2020–2024) — No Drilling Required
Engineered for a perfect OEM+ fit onto Audi A4 B9.5 S‑Line rear bumpers using factory mounting locations. Designed for Sedan (Saloon) body styles. Installs with no drilling, cutting, or modification of any kind required . Simply remove your currently installed valance and install the diffuser using the factory mounting locations and hardware. Make sure all tabs are lined up and lightly press the diffuser in place until the tabs click into position .
Note: This diffuser is NOT compatible with Non‑S‑Line (standard) A4 bumpers or pre‑facelift B9 models. You must have the factory S‑Line exterior package.

5. CE & TUV MATERIALGUTACHTEN Certified
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 is also EPR (France/Germany) compliant, meeting environmental responsibility 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 . If you decide to paint the diffuser, primer must be used first.

Specifications

What's in the Box

• 1 × S4 style rear diffuser 

• 2 × Dual tailpipe exhaust tips

 Installation Guide

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

Installation Time: 1–2 hours | Difficulty: Moderate

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 2020‑2024 Audi A4?

A: Yes, if your vehicle is a B9.5 facelift (2020–2024) with the S‑Line sport bumper. This diffuser will NOT fit Non‑S‑Line (standard) A4 bumpers or pre‑facelift B9 (2015–2019) models. The rear bumpers are different between B9 and B9.5, so a B9 diffuser will not work on a B9.5 and vice versa .

Q2: How do I know if my A4 has S‑Line or Non‑S‑Line?

A: The S‑Line exterior package includes sportier bumpers, side skirts, and fender badges. If your A4 does not have these, you have the standard (Non‑S‑Line) bumper. S‑Line and S4 rear diffusers are physically incompatible with the standard A4 bumper.

Q3: Does this kit include exhaust tips?

A: Yes! The complete kit includes dual tailpipe exhaust tips, self‑tapping screws, and 3M VHB tape — everything needed for a full S4 style rear 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 when using factory mounting locations. However, self‑tapping screws are recommended in corners and tabs for best fitment . The OEM exhaust may require cutting for the exhaust tips to fit.

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