I fixed the noise problem of the NPP exhaust - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jackman0112 · 05-10-2022, 08:48 PM

For a long time, the NPP exhaust pipe often makes metal vibration noise. Today, I finally fix this problem and share it with you.
There are two pull caps (at the yellow arrow) under the exhaust pipe. I pull them out after they are damaged, and then weld the holes. These two pull caps are more like drainage holes, but it is the main problem of noise.
I will weld this hole because there is also a drain hole at the silencer. If you are troubled by this noise for a long time, you can try this method.

05-10-2022, 08:48 PM	#1
Jackman0112 Drives: 11 Camaro 2LT、12 Camaro ZL1 Join Date: Feb 2020 Location: Taiwan Posts: 20	I fixed the noise problem of the NPP exhaust For a long time, the NPP exhaust pipe often makes metal vibration noise. Today, I finally fix this problem and share it with you. There are two pull caps (at the yellow arrow) under the exhaust pipe. I pull them out after they are damaged, and then weld the holes. These two pull caps are more like drainage holes, but it is the main problem of noise. I will weld this hole because there is also a drain hole at the silencer. If you are troubled by this noise for a long time, you can try this method. Attached Images