Bull Boost Performance
Stainless Valved Catback Exhaust System for Audi B8 B8.5 S4 S5
Description
Description
Transform the sound and driving experience of your Audi S4 or S5 B8/B8.5 with the STRATEC Valved Exhaust System. Designed for the supercharged V6 platform, this system delivers a unique high-pitch tone while retaining deep, aggressive low-end character—creating a sound profile that stands out from traditional setups.
Constructed entirely from T304 stainless steel and featuring a high-pitch X-pipe, the system runs 2.5-inch tubing from front to rear, enhancing exhaust flow and sound across the entire RPM range. Integrated vacuum-actuated valves, controlled via an included key fob remote, allow instant switching between refined cruising and an aggressive, motorsport-inspired exhaust note.
Why It Works
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High-Pitch X-Pipe Design: Produces a sharper, more exotic tone while improving exhaust flow
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Vacuum Valve Control: On-demand sound adjustment using the included remote
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Mandrel-Bent Tubing: Optimized flow for improved throttle response and power delivery
Sound & Control
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Valves Closed: Quiet and refined for daily driving and highway cruising
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Valves Open: Aggressive, high-energy exhaust tone with strong low-end and high-RPM excitement
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Remote Control: Instantly operate valves from inside the vehicle
Construction & Details
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Material: T304 stainless steel for durability and corrosion resistance
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Weight Savings: Approx. 12.3 lbs lighter than factory exhaust
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Craftsmanship: Precision TIG welding and smooth mandrel bends
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Tubing Diameter: 2.5" from front to exhaust tips
Vehicle Fitment
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2010–2016 Audi S4 (B8 / B8.5)
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2010–2016 Audi S5 (B8 / B8.5)
25 in stock
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