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  • Audi B9 S4 / S5 Valved Sport Exhaust System
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Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System
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Audi B9 S4 / S5 Valved Sport Exhaust System

Valvetronic Designs
AUD.B9.S4.VSES.BR.BRSH
In stock
$2,499.99 $3,499.99
Audi B9 S4 & S5 Valved Exhaust System Full T304 Stainless Steel System with Electronic Valve Control Overview The Audi B9 S4 and S5, powered by the EA839 3.0L V6, have impressive performance potential—but the stock exhaust hides much of this engine’s true character. The Valvetronic Designs Full Valved Exhaust System unleashes its voice, delivering an aggressive, motorsport-inspired tone when desired, and stock-like refinement when needed. Unlike typical setups requiring multiple components from different vendors, our system is engineered as a complete solution—from the OEM or aftermarket downpipe all the way to the exhaust tips. This single-package design eliminates the need for mixing and matching resonator sections or axle-backs from other brands, ensuring perfect fitment, seamless performance, and consistent sound quality. With valves open, expect a bold exhaust note, pronounced overrun crackles, and a commanding presence. With valves closed, the car returns to quiet factory manners, with zero drone when paired with the OEM downpipe. For those upgrading from the V8-powered B6 or B7 S4, our system delivers the level of engagement and emotional sound you’ve been missing—ensuring your B9 ownership experience is just as exciting. Why It Works One-Piece System Design: Eliminates the need for mixing components from multiple...
Audi B9 S4 / S5 Valved Sport Exhaust System
Valved Sport Exhaust System / (4) Brushed Steel (3.5 Outlet) - $2,499.99
Product Details

Everything You Need To Know

Review product information, shipping and returns, and price-match details before you order.

Product Info

Audi B9 S4 & S5 Valved Exhaust System

Full T304 Stainless Steel System with Electronic Valve Control

Overview

The Audi B9 S4 and S5, powered by the EA839 3.0L V6, have impressive performance potential—but the stock exhaust hides much of this engine’s true character. The Valvetronic Designs Full Valved Exhaust System unleashes its voice, delivering an aggressive, motorsport-inspired tone when desired, and stock-like refinement when needed.

Unlike typical setups requiring multiple components from different vendors, our system is engineered as a complete solution—from the OEM or aftermarket downpipe all the way to the exhaust tips. This single-package design eliminates the need for mixing and matching resonator sections or axle-backs from other brands, ensuring perfect fitment, seamless performance, and consistent sound quality.

With valves open, expect a bold exhaust note, pronounced overrun crackles, and a commanding presence. With valves closed, the car returns to quiet factory manners, with zero drone when paired with the OEM downpipe.

For those upgrading from the V8-powered B6 or B7 S4, our system delivers the level of engagement and emotional sound you’ve been missing—ensuring your B9 ownership experience is just as exciting.

Why It Works

  • One-Piece System Design: Eliminates the need for mixing components from multiple vendors.

  • Electronic Valve Control: Switch between aggressive and refined sound instantly.

  • Mandrel-Bent Construction: Maximizes flow for improved throttle response and power.

Sound & Control

  • Valves Open: Aggressive tone with rich midrange and sharp overrun crackles on deceleration.

  • Valves Closed: Quiet, refined, and OEM-like for comfortable daily driving.

  • No Drone: When paired with the OEM downpipe, cabin comfort is unaffected.

Construction & Options

  • Material: T304 stainless steel for long-term durability and corrosion resistance.

  • Weight Savings: 16.4 lb lighter than the OEM exhaust system.

  • Craftsmanship: Precision TIG welds and mandrel bends for optimal flow and strength.

  • Tips: Includes premium exhaust tips for a finished, performance-oriented look.

Fitment

  • 2017–2024 Audi S4 (B9)

  • 2017–2024 Audi S5 (B9)

    (Doesn't fit Sportback models)

Installation Notes

  • Direct-fit for sedan models.

  • Coupe models require modification to shorten the mid-section for proper fitment. Contact info@valvetronic.com for guidance.

What’s Included

  • Full T304 stainless steel valved exhaust system

  • Electronic exhaust valves with key fob remote system

  • All necessary clamps and hardware

Specifications

  • Tubing: Full mandrel-bent T304 stainless steel

  • Valves: Electronic, remote-controlled

  • Weight Savings: 16.4 lb lighter than OEM

  • Finish: Brushed stainless steel



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Shipping on new purchases

In Stock Items:
In stock items typically ship within 1-3 business days. Most items arrive within 2 business days, but there are situations where it may take up to 5 business days.

Special Order Items:
Special order and out of stock items are product-specific and lead times can vary. Please e-mail us if you are looking for an ETA / Lead Time on a specific product. Special order orders are subject to cancellation if the vendor cannot provide any ETA.

Returns Policy

To start the return process, please e-mail sales@allianceracing.com

Include the following:
Subject "Return for Order#"
Order Number
Part Number
Reason

Returns are eligible for up to 14 days from delivery of items. Accepted refunds can take up to 7-10 business days to process. All refunds are subject to a 25% restocking fee, if opened. Customer may be responsible for return shipping. If 14 days have gone by since your item was delivered, unfortunately we can’t guarantee you a refund or exchange. We reserve the right to deny any return request, based on provided information.

Alliance Racing is not responsible for ensuring part fitment. It is the responsibility of the purchaser to ensure the parts being ordered are the correct fitment for the vehicle intended. Alliance Racing will not accept any returns for incorrect fitment after product is opened.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Shipping

To return your product, mail your product to:
Alliance Racing LLC
8810 Twin Lakes Blvd
Tampa, FL 33614

In many cases, you will be responsible for shipping costs to return your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping will be deducted from your refund.

Depending on your location, the time it may take for your exchanged product to reach you may vary.

If you are shipping an item over $100, you should consider using a trackable shipping service and/or purchasing Shipping Insurance.

To initiate a price match, please e-mail sales@allianceracing.com with the product information (SKU, URL, & Part Name) and a link to the competitors product page for us to validate the price match eligibility.

Please note that there are cases when we cannot offer a price match, but we will do everything in our power to try to match it. Some manufacturers have Pricing Policies that we have to adhere to.

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