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Asign Replacement Rear Diffuser & Quad Exhaust Tip Kit for Audi A5 / S5 B9.5 (2020–2024)

Name: Asign Replacement Rear Diffuser & Quad Exhaust Tip Kit for Audi A5 / S5 B9.5 (2020–2024)
Brand: PNB-Car-Accessories
Price: 899 USD
Availability: InStock

3-5 Business Days Delivery from U.S. Warehouses

Diffuser Style

S line S5 style rear diffuser with tailpipe S line ABT Style rear diffuser with tailpipe S line light style rear diffuser with tailpipe S line Lamborghini style rear diffuser with tailpipe

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From $899.00 USD

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Replacement Rear Conversion

A Complete Quad-Outlet Rear Upgrade for the Audi A5 / S5 B9.5

Replace the understated factory lower rear section with a more defined diffuser and matching quad exhaust outlet layout. Multiple designs let you choose between a clean factory-inspired appearance and a more aggressive motorsport profile.

Replacement DesignNot a tape-on cover

Quad Outlet LayoutBalanced left and right profile

Four Style OptionsFrom restrained to aggressive

Photo ConfirmationRear bumper checked before shipping

Give the Rear of Your A5 a Proper Performance Finish

The factory rear bumper can make the exhaust area look visually flat, especially when the original outlets are hidden or angled downward. This conversion creates a wider, more symmetrical rear profile by pairing a replacement diffuser with matching left and right quad-style exhaust outlets.

Unlike small adhesive fins or universal trim pieces, this is a replacement-style rear conversion designed around the shape of the matching bumper configuration. The result is a more integrated appearance with stronger definition around the lower bumper.

Designed for Owners Who Want More Than a Cosmetic Sticker

This kit changes the complete lower rear presentation rather than placing a small accessory over the original diffuser.

The diffuser, exhaust openings and outlet assemblies are designed to work together as one coordinated rear-end upgrade.

Why This Rear Diffuser Conversion Works

Replacement Installation

The original lower diffuser or rear valance is removed before the new diffuser is installed. It is not an overlay and is not held in place with adhesive tape alone.

Integrated Quad-Outlet Design

Matching left and right outlet assemblies create a balanced four-tip appearance instead of leaving oversized decorative openings around the factory exhaust.

Model-Specific Rear Profile

The diffuser is shaped for the corresponding B9.5 rear bumper configuration, providing a cleaner transition between the bumper, diffuser and exhaust outlet areas.

Multiple Styling Directions

Choose a restrained S5-inspired profile, a layered ABT-inspired design, an illuminated center-light version or a more angular motorsport appearance.

Stronger Visual Proportions

Deeper fins and wider exhaust detailing visually lower the rear of the vehicle and help the bumper appear broader and more performance-focused.

Fitment Checked by Photo

A clear rear-view photo allows the bumper, body style and existing exhaust layout to be checked before the selected configuration is prepared.

Choose Your Diffuser Style

S5 Style

The cleanest option for an OEM-plus conversion. It adds quad exhaust outlets and defined center fins without making the rear design overly complex.

ABT-Inspired Style

A more sculpted profile with stronger lower-edge definition and a more pronounced performance-tuning appearance.

LED Center Light Style

Features a center light detail for a modern motorsport-inspired focal point. This version requires additional electrical connection during installation.

Aggressive Motorsport Style

The most angular option, using deeper fins and sharper lower contours for owners seeking a more dramatic rear-end transformation.

Style and package contents vary by selection.

Review the option images carefully. The diffuser shape, outlet finish, center light and included connecting components may differ between styles.

Compatibility

Compatible Make	Audi
Model	A5 / S5
Generation	B9.5 facelift generation
Model Years	2020–2024
Installation Type	Replacement rear diffuser with matching quad exhaust outlet conversion
Not Confirmed	RS5, earlier B9 models, 2025+ vehicles or unmatched rear bumper configurations

A vehicle photo is required for confirmation.

S line and non-S line bumpers can use different mounting shapes. Coupe, Sportback and Cabriolet configurations must not be assumed interchangeable. After ordering, send a clear, straight-on photo of the complete rear bumper and exhaust area to our customer service team.

Before Ordering

Confirm that the vehicle is an Audi A5 or S5 B9.5 from model years 2020–2024.
Identify whether the original rear bumper is S line or non-S line.
Select the body style used by your vehicle: Coupe, Sportback or Cabriolet.
Take one clear, straight-on photo showing the entire rear bumper.
Take one close-up photo showing the original diffuser and exhaust outlet area.
Send the photos with your order number for final configuration confirmation.

Professional Installation Recommended

Confirm Configuration

Check the model year, bumper type, body style and selected diffuser before any original components are removed.

Remove Original Diffuser

The factory lower diffuser or rear valance must be removed to access its mounting points.

Align Diffuser and Outlets

Test-fit the new diffuser and both outlet assemblies before modifying or securing the factory exhaust.

Complete Exhaust Connection

Connect, adjust and secure the outlet components. LED versions also require electrical connection and testing.

This is not a basic tape-on installation.

Depending on the original exhaust layout, cutting, trimming, pipe adjustment, bracket positioning or other exhaust work may be required. Installation should be completed by an experienced body shop, exhaust shop or automotive modification specialist.

Package Information

Package Typically Includes

1 × Replacement rear diffuser
1 × Left exhaust outlet assembly
1 × Right exhaust outlet assembly
Matching connectors or clamps shown with the selected option
Center LED component and wiring for LED style only

Important Package Notes

This is not a complete cat-back exhaust system.
Package contents vary according to the selected diffuser style.
Only components shown for the selected option should be expected.
Professional installation labor is not included.
Original vehicle parts removed during installation are not supplied.

Frequently Asked Questions

Is this diffuser an adhesive overlay?

No. This is a replacement-style rear diffuser. The original lower diffuser or valance must be removed before the new component is installed.

Does it fit both S line and non-S line bumpers?

S line and non-S line rear bumpers can have different shapes and mounting points. Do not order based only on the model year. A rear-view vehicle photo is required for confirmation.

Will it fit my Audi S5?

S5 compatibility depends on the exact rear bumper, body style and exhaust configuration. Send clear photos of the original rear bumper before installation or modification.

Are the exhaust tips functional?

The kit includes matching outlet assemblies intended to be connected and aligned with the vehicle's exhaust layout. It is not simply a set of decorative openings molded into the diffuser.

Does installation require cutting the factory exhaust?

Cutting or pipe modification may be necessary depending on the original exhaust direction and outlet position. The installer should test-fit every component before making permanent modifications.

Can I install it myself?

Installation requires bumper-component removal, diffuser alignment and possible exhaust modification. Professional installation is strongly recommended.

Does the LED style require wiring?

Yes. The center light must be connected and tested during installation. Wiring should be completed by a qualified installer using a suitable power source for the vehicle.

Is a full exhaust system included?

No. This product is a rear diffuser and exhaust outlet conversion kit. It does not include a complete cat-back exhaust, muffler system or engine performance upgrade.

Build a More Complete Audi A5 Rear Profile

Pair the diffuser conversion with carefully selected exterior upgrades designed for the Audi A5 and S5 platform.

Explore Audi A5 / S5 Upgrades

Audi model names are used only to identify vehicle compatibility. Asign is an independent aftermarket parts provider and is not affiliated with or endorsed by Audi AG.

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2020-2024 Audi S5 Style A5 diffuser with tailpipe For Audi A5 S5 B9.5

Front Bumper Installation Guide

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Frequently Asked Questions

What makes Asign different from other brands?

Asign stands out by offering meticulously designed carbon fiber kits that fit seamlessly with a variety of vehicle models. Our commitment to precision, use of high-quality materials, and focus on ease of installation set us apart in the market.

Why should I choose Asign's carbon fiber kits?

A1: Precision Design & Fit

Our design process strictly follows original vehicle specifications to ensure a perfect fit for your car. We approach each product with exceptional care and attention to detail.

A2: High-Quality Materials & Manufacturing
Asign uses the highest precision steel molds for production, reducing errors and maximizing accuracy. We employ pre-impregnated carbon fiber for all our products, making them genuine and lightweight, yet as strong as steel.

A3: Easy Installation & Non-Destructive Removal
Most of our carbon fiber kits can be installed in under 10 minutes (excluding special items like Front Splitters, Rear Diffusers, and Exhaust Tips). Designed for quick installation and removal without damaging your car's surface, our products offer both convenience and flexibility.

How does Asign ensure product quality?

Asign upholds strict quality control standards throughout the production process. We use premium materials and advanced manufacturing techniques, followed by comprehensive testing to ensure every product meets our high standards for performance and durability.

What if I have a quality issue with my product?

If you encounter any quality issues with your Asign product, please contact our customer service team right away. We will promptly address your concerns and offer solutions, including replacements or refunds, as appropriate.

How can I make sure the product I order fits my vehicle?

Before placing an order, carefully check your vehicle's specifications and refer to the product description for compatibility information. If you have any questions or concerns, our customer service team is always available to provide personalized advice and guidance.

What is Asign's return policy?

Our return policy varies depending on the specific product and the reason for the return. Please refer to our website or contact our customer service team for detailed information on our return and exchange procedures.

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Asign Replacement Rear Diffuser & Quad Exhaust Tip Kit for Audi A5 / S5 B9.5 (2020–2024)

A Complete Quad-Outlet Rear Upgrade for the Audi A5 / S5 B9.5

Give the Rear of Your A5 a Proper Performance Finish

Designed for Owners Who Want More Than a Cosmetic Sticker