Audi S4 Performance Exhaust - APR - Catback - Polished Stainless Steel - `18-`25
Audi S4 Performance Exhaust - APR - Catback - Polished Stainless Steel - `18-`25
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Audi S4 Performance Exhaust - APR - Catback - Polished Stainless Steel - 2018-2025. This catalyst-back system brings a deeper tone and improved flow while retaining factory valve control on your B9 S4.
Built from T304 stainless with mandrel bends and TIG welds, this RS-inspired system reduces restriction and keeps drone in check with an integrated Helmholtz resonator. Valve-controlled mufflers retain OEM operation, and 3.5 in polished single-wall tips with APR logos complete the package. APR reports gains up to 10 hp and 12 ft-lb at the wheels.
Features
- Dual 2.5 in to dual 2.75 in merging to a 3.5 in center via cast Y
- Quad 3.5 in polished single-wall tips with APR logo
- Precision brackets, OEM-style slip clamps, upgraded tunnel brace
- Valve-integrated rear mufflers; Helmholtz resonator for reduced drone
- Fits 2018-2025 Audi S4 (B9); cat-back retains emissions equipment
Questions or ready to schedule? Call our Austin, Texas shop at 512-982-9393 and our Los Angeles, California area shop at 562-981-6800. We offer professional installation and customization at both locations.
Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Need Assistance?
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Call us at 512-982-9393 (Austin, TX) or
562-981-6800 (Signal Hill, CA)
and get assistance from one of our sales team members!
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