Audi B9 S4 / S5 Valved Sport Exhaust System
Audi B9 S4 / S5 Valved Sport Exhaust System - Valved Sport Exhaust System / (4) Brushed Steel (3.5 Outlet) is backordered and will ship as soon as it is back in stock.
Pickup available at LMTLS Auto
Usually ready in 24 hours
Delivery and Shipping
Delivery and Shipping
At LMTLS Auto, we prioritize getting your orders to you in a timely and safe manner. We also understand that accidents can happen during transit, which is why we’ve partnered with Navidium Protection to offer added peace of mind with every purchase.
Please allow up to 48 hours to process and ship your IN-STOCK ORDER. Orders for items that are not in-stock can take much longer. If you have a time sensitive shipment please email us to ensure there are no delays.
Free shipping promotions do not apply to orders shipping to:
Hawaii, Alaska, Puerto Rico and U.S. outlying territories (Guam, Virgin Islands, Etc.), International orders and limited other occasions.
We reserve the right to cancel any order in which the customer does not want to pay the shipping cost difference.
INTERNATIONAL SHIPMENTS
International orders are shipped via USPS FedEx or DHL.
All international shipments may be subject to customs fees, import duties and taxes. These fees are not integrated into the item pricing or shipping charges. These fees are paid by the buyer, upon arrival to its international destination. Any charges associated with the importation of products purchased from LMTLS Auto are the responsibility of the buyer. We do not pre-pay any customs fees, duties or taxes when the shipment arrives to the international destination. Any costs resulting from the refusal to import a product purchased through LMTLS Auto may result in additional charges.
Audi B9 S4 / S5 Valved Sport Exhaust System
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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2018–2024 Audi S5 (B9)
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.
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100% reversible—return to stock at any time.
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
Payment & Security
Payment methods
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