Bull Boost
Bull Boost Titanium Valved Catback Exhaust System for Audi B9 S4 S5
Bull Boost Titanium Valved Catback Exhaust System for Audi B9 S4 S5
Regular price
$2,699.95 USD
Regular price
Sale price
$2,699.95 USD
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- Ships direct from the brand or supplier
- Tracking emailed when it ships
- Free fitment check before you order
Listed for: Audi B9 S4 S5Fitment notes & questions
Titanium Valved Catback Exhaust System by Bull Boost for Audi. Exhaust parts carry gases away from the engine, quiet the sound and clean up emissions.
Quick facts
- Brand: Bull Boost
- Part type: Exhaust part
- Listed for: Audi
Specifications
- Ultra-Light Titanium Construction: Significant weight savings over stainless steel
- Electronic Valve Control: Instantly switch between aggressive and refined sound
- One-Piece System Design: No need to mix axle-backs or resonators
- Mandrel-Bent Titanium Tubing: Maximizes flow and throttle response
- Valves Open: Loud, sharp, and performance-focused exhaust tone
- Valves Closed: Quiet, refined, and daily-drivable
- No Drone: When paired with the OEM downpipe
- Material: Full titanium construction for extreme weight reduction
- Weight Savings: Significantly lighter than factory and stainless systems
- Craftsmanship: Precision TIG welding and smooth mandrel bends
- Exhaust Tips: Includes premium titanium tips for a motorsport finish
Listed fitment
- 2017–2024 Audi S4 (B9)
- 2018–2024 Audi S5 (B9)
Tip: Check local noise and emissions rules, and use new gaskets and hangers when you fit it.
Before you order: Audi B9 S4 S5 exhaust part fitment
Exhaust parts carry gases away from the engine, quiet the sound and clean up emissions.
Fitment notes
- Listed for: Audi B9 S4 S5.
- Specs, lead time and warranty come from Bull Boost and can change. The details above this guide are the latest we have.
Not sure it fits? Send us your year, make, model, engine and trim and we'll check before you order.
Ask about fitmentPlan the whole job
- Clamps and hangers. Old hardware is usually rusted.
- Gaskets. New gaskets prevent leaks at each joint.
More for your car: Audi Parts · Exhaust
Questions about Audi B9 S4 S5 exhaust part
Will this fit my Audi B9 S4 S5?
It is listed for the Audi B9 S4 S5. Check your year, model, engine and trim against the title and details above. If anything is different, contact us and we will confirm fitment before you order.
Is this street legal where I live?
Rules vary by state. Check local noise and emissions rules before you buy.
Where do specs and warranty details come from?
From Bull Boost. Each brand sets its own specs, lead times and warranty terms, and they can change. The product details above are the latest we have.
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