Rattling After Catless Downpipe Install
Thread Starter
Junior Member
Joined: Jun 2025
Posts: 54
Likes: 4
2019 C63s AMG
Rattling After Catless Downpipe Install
Alrighty, so It looks like I've developed a rattling after going Catless. I'm used to the normal louder noise from previous catless cars I've had but it's strange that the rattling only occurs when the car is in drive. If I'm parked or in neutral there's no rattling but in drive there's a distinct rattling. It's sounding like it's coming from under the car but I've checked all Vbands / clamps and they're all snug. Anyone experience a rattling after going catless and only occuring when in drive? Under load it gets quite loud, louder than usual catless sounds go. Car is a 2019 coupe. Thanks again!
Junior Member
Joined: Aug 2024
Posts: 26
Likes: 12
FL W205 C63
I don't want to speculate on your specific situation, but just know that pre-facelift and facelift downpipes are slightly different. Facelift cars have an additional transmission mount for the downpipes, and I believe only RedStar Exhaust makes proper facelift downpipes for these cars. This is exactly why I went with them for my 2020 sedan. Just a thought.
Other than that, I have heard that the turbo to downpipe clamps should really be 1-use, and this could result in rattling. Do you notice any additional exhaust smell/hisses from the engine bay?
Other than that, I have heard that the turbo to downpipe clamps should really be 1-use, and this could result in rattling. Do you notice any additional exhaust smell/hisses from the engine bay?
Thread Starter
Junior Member
Joined: Jun 2025
Posts: 54
Likes: 4
2019 C63s AMG
I don't want to speculate on your specific situation, but just know that pre-facelift and facelift downpipes are slightly different. Facelift cars have an additional transmission mount for the downpipes, and I believe only RedStar Exhaust makes proper facelift downpipes for these cars. This is exactly why I went with them for my 2020 sedan. Just a thought.
Other than that, I have heard that the turbo to downpipe clamps should really be 1-use, and this could result in rattling. Do you notice any additional exhaust smell/hisses from the engine bay?
Other than that, I have heard that the turbo to downpipe clamps should really be 1-use, and this could result in rattling. Do you notice any additional exhaust smell/hisses from the engine bay?
