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Akrapovic 2021-2025 Audi S3 Sedan (8Y) Evolution Line Cat Back (Titanium) w/Carbon Tips - S-AU/TI/18H

MSRP: $7,994.84
$6,474.43
(You save $1,520.41 )
SKU:
akrS-AU/TI/18H
UPC:
3831113513388
Box Weight:
72.00 LBS
Shipping:
Calculated at Checkout

 Free Shipping On Most Orders Over $99. Within The Continental US. A Signature Will Be REQUIRED For Delivery On All Orders Over $250.00. Exclusions May Apply.  Learn More

Akrapovic 2021-2025 Audi S3 Sedan (8Y) Evolution Line Cat Back (Titanium) w/Carbon Tips - S-AU/TI/18H

The Akrapovic Evolution Line Catback (Titanium) (Part #S-AU/TI/18H) is the ultimate upgrade for the 2021–2025 Audi S3 Sedan (8Y). Designed using lightweight, race-proven materials, this system combines titanium construction with two sets of handcrafted carbon-fiber tailpipes for a premium performance exhaust that reduces weight, improves power, and amplifies the S3’s sporty character.


Lightweight Design with Real Gains

Crafted from titanium for the muffler and link pipe sections, this exhaust sheds over 41% of the weight compared to the factory system. The result is sharper handling and improved responsiveness.

Dyno testing confirmed:

  • +4 kW (5.4 hp) at 4,350 rpm

  • +8.8 Nm torque at 3,900 rpm

All gains were measured against a stock S3 exhaust on Akrapovic’s dyno. No ECU remap is required — this is a plug-and-play upgrade.


Tailored Sound with Valve Control

This Evolution Line features a specially cast valve housing from Akrapovic’s in-house foundry, positioned outside the muffler for optimal gas flow. This allows the system to deliver:

  • Smooth, rich tone under normal cruising.

  • Deep, sporty sound when driving more dynamically.

  • Aggressive character when pushed to the limit.

An optional Akrapovic Sound Kit is available for full driver control over the exhaust note. (Note: with the Sound Kit installed, the ECE type-approval certificate is not valid.)


Premium Materials & Finishes

  • Muffler & Link Pipe: Lightweight titanium

  • Tailpipes: Two sets of handcrafted carbon fiber with titanium inner sleeves

  • Valve Housing: Cast in Akrapovic’s in-house foundry

  • Optional: Akrapovic Sound Kit for sound management

The system is ECE type approved for cars equipped with Otto/gasoline particulate filters.


Key Specifications

  • Product Line: Akrapovic Evolution Line (Titanium)

  • Part Number: S-AU/TI/18H

  • Material: Titanium system with carbon-fiber tips

  • Weight Reduction: 41% lighter than OEM system

  • Power Gains: +4 kW (5.4 hp) @ 4,350 rpm

  • Torque Gains: +8.8 Nm @ 3,900 rpm

  • Valve Design: External housing, cast in-house

  • Approval: ECE type approved (unless Sound Kit is installed)


Vehicle Fitment

This Akrapovic system is confirmed to fit the following:

  • 2021 Audi S3 Sedan (8Y)

  • 2022 Audi S3 Sedan (8Y)

  • 2023 Audi S3 Sedan (8Y)

  • 2024 Audi S3 Sedan (8Y)

  • 2025 Audi S3 Sedan (8Y) (fitment confirmed, but due to an agreement with Audi — who offered this system as an option during new vehicle orders — Akrapovic cannot advertise official 2025 fitment even though it fits.)


Why Choose the Akrapovic Evolution Line for Your S3?

  • Titanium Construction: Race-proven, ultra-lightweight design

  • Carbon Tips: Handcrafted finish for a premium look

  • Proven Gains: +5.4 hp and +8.8 Nm torque without tuning

  • Sound Engineering: Adaptive valve system for versatile tone

  • ECE Approved: Street-legal in Europe when used without the Sound Kit

Shipping & Returns

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HOW TO RETURN AN ORDER

To return an order, please contact us HERE, with detailed information regarding the return. We can only accept items that are in new condition and have never been installed. We cannot accept any used, previously installed, or damaged items. If an item is sent back to us used, previously installed and/or damaged, it is now the property of Just Bolt-On Performance Parts and no refund will be issued. All returns must include the provided Return Merchandise Authorization (RMA) form or RGA number, to help expedite the return process. We will then provide the Return Shipping Address for the return. Pictures of the parts being returned are also required. All returns are subject to a 20% Restocking Fee of the original purchase price. Some orders cannot be return – see the list of non-returnable orders below. 

RETURN POLICY

The buyer has 30 days from original purchase to initiate a return RMA and forward tracking information to us. No refund will be given for products that arrive after the 30 days from the original purchase date. Tracking information is required for all returns. When shipping an item back to us, we recommend that you use UPS, FedEx or any other carrier that offers signature confirmation and insurance, as we are not responsible for lost or damaged packages. Only the signature of an Just Bolt-On Performance Parts employee will suffice as proof of delivery. The customer agrees to bear all shipping and insurance charges, and all risk of loss during return shipment. If an order is refused “Returned to Sender”, no refund will be issued. Buyer is responsible for all return shipping charges.

We will not accept a return of an item that is damaged or defective if it has been used/installed, please inspect all orders as soon as you receive them and contact us HERE within 72 hours. If the order is damaged during shipment, Just Bolt-On Performance Parts will replace the item free of charge. 

When you purchase items that qualify for a promotional offer such as Buy "X" number of items, Get "X" number of items free, the discount reflecting the price of the lowest-priced item is proportionally applied to each eligible item. If any item is returned, the refund will be equal to the original price of the item reduced by the proportional discounted amount.

RECEIVED DAMAGED ORDER

We try our best to prevent damage to all packages during transit by packing each order carefully. From time to time, though, damage will occur despite our precautions.  If you receive an item that has been damaged in shipping, please call us within 72 hours of receipt and we will set up a claim for the product. Once this claim has been processed by the courier, we will reach out to you to return the product and send out a replacement.

We may request pictures to further assist with the completion of the claim.

The courier will reach out to you after the claim has been filed over the phone; please provide a reliable contact number when setting up your damage claim.

DEFECTIVE PRODUCTS

If you receive a defective product, please contact us within 72 hours, and we will process your return or replacement free of shipping charge. Contact us HERE to process your return.

In the event of a defect that occurs outside our return policy, but within the manufacturer warranty, please contact the manufacturer directly to process your return. The manufacturer will have sole determination of the outcome of the claim. As a courtesy to our customers, Just Bolt-On Performance Parts will be happy to try to facilitate a thorough review of the claim, but we have no final say in the decision made by the manufacturer (i.e. approvals, denials, fees, etc.).

Just Bolt-On Performance Parts is not responsible for any labor costs which occur as the result of the installation of wrong or defective parts.

NON-RETURNABLE ORDERS

Returns will not be given for the following items:

·       Just Bolt-On Performance Parts gift cards.

·       Any products sold as "Open Box". 

·       Non-defective used or installed items.

·       Wheels that have already been mounted and balance. This includes wheels packages from Just Bolt-On Performance Parts.

·       All special orders, custom, and/or built to order parts. This includes but not limited to, Weld Offroad, Addictive Desert Design, Rigid Industries, Please contact us prior with any questions. 

·       All electronics including but not limited to handheld devices and chargers.

·       Batteries, fluids, lubricants and all maintenance products.

·       All orders that required freight delivery.

·       International orders that shipped outside of the United States.

REFUNDS

Once the return is received, please allow 5-7 business days for the refund to be issued. All items included in the return are fully inspected by our Returns Department prior to issuing a refund. All refunds will be issued to the original payment method. Allow 3-5 business days for the refund to settle back to the original payment method. The original shipping and handling charges are non-refundable. Processing time will vary, depending on your financial institution. 


NEED TO CANCEL

We strongly suggest you call us at 1-844-526-2658 as soon as possible after placing your order if you need to change or cancel it, as orders are processed within minutes!  If you email us, we may not receive them in time to stop the order from shipping out.  Please double-check that your order details are correct before submitting your order during checkout.

An order that has already received tracking information and/or shipped cannot be canceled.  If an order has been assigned a tracking number but the tracking information has not updated, this does not mean the order has not shipped. Please contact us HERE to set up a Return Merchandise Authorization (RMA) once your order has been received.

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Just Bolt-On Performance Parts Frequently Asked Questions

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