💥‼️ RS4 B9 + Non-Res Mid Pipes = Natural Exhaust Crackles

Sometimes the simplest formula delivers the biggest smile. Fitting non-resonated mid-pipes to the Audi RS4 B9 unlocks a deeper tone and those natural, tasteful crackles the 2.9TT engine is capable of — all without touching the catalysts or OPF systems.

No gimmicks. No artificial pops. Just cleaner flow and a more expressive soundtrack from the rear.

🔊 Why This Works

• Removes the restrictive resonators

• Enhances natural overrun sound

• Keeps CATs and OPFs fully intact

• Maintains emissions control compliance

• Adds character without going overboard

A simple mid-pipe change brings the RS4 B9 to life, giving it the sharper, more emotional note many owners wish it had from factory.

Looking for a subtle but effective sound upgrade?
This setup is one of the best OEM+ exhaust mods for the RS4.