Stainless Valved Catback Exhaust System for Audi B9 S4 S5
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
The Audi B9 S4 and S5, powered by the EA839 3.0L V6, offer strong performance from the factory—but the stock exhaust limits the engine’s true sound and character. The STRATEC Valved Exhaust System unlocks a more aggressive, performance-driven exhaust tone while retaining refined, OEM-like manners when desired.
Engineered as a complete, one-piece exhaust system, this setup runs from the downpipe connection to the exhaust tips, eliminating the need to mix components from multiple suppliers. The result is consistent sound quality, proper fitment, and seamless performance.
With valves open, expect a bold, motorsport-inspired exhaust note with pronounced overrun crackles. With valves closed, the system returns to a quiet, refined tone suitable for daily driving—without unwanted drone when paired with the factory downpipe.
Why It Works
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Complete One-Piece System: No mixing of axle-backs or resonators
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Electronic Valve Control: Instantly switch between aggressive and refined sound
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Mandrel-Bent Design: Optimized exhaust flow for improved throttle response and power
Sound & Control
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Valves Open: Aggressive tone with strong midrange and sharp overrun crackles
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Valves Closed: Quiet, refined, and OEM-like for daily driving
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No Drone: When used with the factory downpipe
Construction & Details
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Material: Full T304 stainless steel construction
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Weight Savings: Approx. 16.4 lbs lighter than factory exhaust
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Craftsmanship: Precision TIG welding and smooth mandrel bends
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Exhaust Tips: Includes premium tips for a clean, performance-oriented finish
Vehicle Fitment
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2017–2024 Audi S4 (B9)
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2018–2024 Audi S5 (B9)
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.