Titanium Catback Exhaust Audi S4, S5 B9

PHP Titanium Cat-Back Exhaust – Audi S4 / S5 B9 (2017–2023)

Fits: Audi S4 & S5 B9 (3.0T V6 Turbo)
Estimated Power Gains: +12–20 HP / +15–22 lb-ft Torque
Weight Savings: ~35% lighter than stainless steel systems

Upgrade your Audi’s performance and sound with the PHP Titanium Cat-Back Exhaust System, engineered for the enthusiast who demands the best in weight reduction, power delivery, and acoustic precision. Crafted from lightweight aerospace-grade titanium, this system significantly reduces weight over stock, enhances throttle response, and adds a raw, motorsport-inspired tone.

The precision mandrel bends and smooth interior surfaces ensure optimal exhaust gas flow, unlocking power gains across the RPM range. Its refined yet aggressive sound profile transforms your S4 or S5 into a true performance machine—without excessive drone at highway speeds.

Key Features:

• Estimated Gains: +12–20 HP / +15–22 lb-ft torque

• Material: Full titanium construction for durability and performance

• Sound Profile: Crisp, exotic tone under acceleration; deep burble at idle

• Design: Dual-exit tips available in burnt blue, polished, or stealth black

• Installation: Direct bolt-on; fully compatible with OEM mounting points

• Optional Valvetronic Add-On: Available for variable sound control (contact us to customize)

Vehicle Fitment:

• 2017–2023 Audi S4 (B9/B9.5)

• 2017–2023 Audi S5 Coupe, Sportback, and Cabriolet (B9/B9.5)

Please select your specific model below before checkout. If you have questions about fitment or would like to request a custom tip finish, reach out through our PHP contact portal.