Valvetronic Designs - Audi B9 S4 / S5 Valved Sport Exhaust System
- Description
- Fitment
- Refund Policy
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
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One-Piece System Design: Eliminates the need for mixing components from multiple vendors.
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Electronic Valve Control: Switch between aggressive and refined sound instantly.
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Mandrel-Bent Construction: Maximizes flow for improved throttle response and power.
Sound & Control
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Valves Open: Aggressive tone with rich midrange and sharp overrun crackles on deceleration.
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Valves Closed: Quiet, refined, and OEM-like for comfortable daily driving.
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No Drone: When paired with the OEM downpipe, cabin comfort is unaffected.
Construction & Options
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Material: T304 stainless steel for long-term durability and corrosion resistance.
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Weight Savings: 16.4 lb lighter than the OEM exhaust system.
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Craftsmanship: Precision TIG welds and mandrel bends for optimal flow and strength.
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Tips: Includes premium exhaust tips for a finished, performance-oriented look.
Fitment
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2017–2024 Audi S4 (B9)
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2017–2024 Audi S5 (B9)
(Doesn't fit Sportback models)
Installation Notes
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Direct-fit for sedan models.
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Coupe models require modification to shorten the mid-section for proper fitment. Contact info@valvetronic.com for guidance.
What’s Included
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Full T304 stainless steel valved exhaust system
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Electronic exhaust valves with key fob remote system
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All necessary clamps and hardware
Specifications
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Tubing: Full mandrel-bent T304 stainless steel
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Valves: Electronic, remote-controlled
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Weight Savings: 16.4 lb lighter than OEM
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Finish: Brushed stainless steel
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
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.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
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