The owner of this Mercedes-Benz C63 AMG has been to us before with his B7 Audi RS4. The last time he was here, we replaced the resonated centre section with the non-res section because the quieter version was a little underwhelming (for an RS4). Now he's back, this time with his C63 looking to make some more noise.
The Milltek secondary cat bypass is a brilliant kit which is relatively cheap and easy to install. It retains the standard backbox, resonator and the primary cat which controls fuelling, so there's no issues with engine management lights or the requirement of an ECU remap.
You can hear how it sounds below: