2020-2024 For Audi A4 S4 B9.5 Audi RS4 Style A4 Diffuser With Large Dual Tailpipe Exhaust Tips

Product Description

Transform the rear profile of your 2020–2024 Audi A4 S‑Line or S4 B9.5 with this RS4‑style rear diffuser complete with large dual tailpipe exhaust tips. Designed specifically for the facelifted B9.5 platform (2020–2024), this full replacement kit replaces the factory rear valance with the aggressive, race‑inspired look of the legendary RS4—featuring a gloss‑black UV‑stabilized ABS polymer construction, aggressive honeycomb design, and substantial dual‑outlet openings.

Unlike the restrictive, boring factory plastic valance, this RS4‑style diffuser opens up the rear, giving your car a much more flowing and performance‑oriented appearance that perfectly complements its natural lines. The rear diffuser is both an aesthetic upgrade and a functional aerodynamic component – it changes the way air flows around the bumper to improve high‑speed stability.

 Critical Fitment Note: This diffuser is exclusively for Audi A4 B9.5 S‑Line (2020–2024) and S4 sedans (2020–2024). It will NOT fit Non‑S‑Line (standard) A4 bumpers or pre‑facelift B9 (2015–2019) models. The rear bumpers differ between B9 and B9.5, and between S‑Line and standard, making diffuser compatibility non‑interchangeable. You must have the factory S‑Line exterior package (or be an S4) for this to fit.

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

Aerodynamic Benefits: The sculpted honeycomb design helps smooth airflow, reduce turbulence, and enhance rear‑end stability at higher speeds – a subtle but real performance‑oriented 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 (Bullet‑Point Summary)

1. Aggressive RS4 Style Design with Large Dual Tailpipe Exhaust Tips
   Give your A4 B9.5 S‑Line or S4 the sharp, race‑bred look of the RS4. Aggressive honeycomb pattern and sculpted lines create a bold, motorsport‑inspired appearance that dramatically enhances the rear profile. This diffuser is specifically contoured to match the factory S‑Line/S4 bumper, ensuring a seamless fit.

2. Complete 1‑Stop Conversion Kit
   All‑in‑one kit includes the rear diffuser and large dual exhaust tips — everything needed for a full RS4‑style rear transformation. Features a dual‑outlet design (left + right) that fits factory and most aftermarket exhaust systems and is designed to accept large‑diameter tips. Choose between polished stainless steel or black‑chrome finishes to match your personal style.

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. This product has been TÜV MATERIALGUTACHTEN certified, verifying the 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.

4. Direct Fitment for B9.5 S‑Line / S4 (2020–2024) – No Drilling Required
   Engineered for a perfect OEM+ fit onto Audi A4 B9.5 S‑Line and S4 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 to install this diffuser.

5. CE & TÜV Certified + EPR Compliant
   This diffuser is CE certified, meeting European safety and quality standards for automotive aftermarket parts. It has also received TÜV 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 × RS4‑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: 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 (or an S4). 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, and between S‑Line and standard, 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 RS4 rear diffusers are physically incompatible with the standard A4 bumper.

Q3: Does this kit include exhaust tips?

A: Yes! The complete kit includes large dual tailpipe exhaust tips, self‑tapping screws, and 3M VHB tape — one complete stop 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 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.