Loud rattling sound coming from rear of car after Cora Extreme Exhuast

carlythecamaro · 12-06-2022, 05:18 PM

hey all, new to this website but i'm having an issue with my car hoping someone can help. recently just had a corsa extreme exhaust installed with texas speed headers, got the proper tune but noticed on cold start & with i give it gas below 1500RPM there's this awful loud, rattle/ banging noise. took it back to the shop and was told that maybe i have a loose exhaust valve? i have provided a link to my cold start, any help would be much appreciated http://youtube.com/shorts/m3-JcsPUelw?feature=share

ALMN · 12-26-2022, 03:46 PM

You might have a Corsa rattle issue with the NPP exhaust. There is even bunch out there on youtube. Try to follow GM tsb on exhaust valve rattle fix, if that doesn’t work go underneath the car with a rubber mallet and identify where the rattle is coming from.

RED HULK · 01-14-2023, 06:06 PM

My aftermarket exhaust was getting hit by the driveshaft bolts. Only on hard downshifts. Wouldn’t happen with active rev match on. Heated up the pipe and pinched it with big channel locks and it’s good now.

12-06-2022, 05:18 PM	#1
carlythecamaro Drives: 2017 Camaro SS Join Date: Nov 2022 Location: Indiana Posts: 53	Loud rattling sound coming from rear of car after Cora Extreme Exhuast hey all, new to this website but i'm having an issue with my car hoping someone can help. recently just had a corsa extreme exhaust installed with texas speed headers, got the proper tune but noticed on cold start & with i give it gas below 1500RPM there's this awful loud, rattle/ banging noise. took it back to the shop and was told that maybe i have a loose exhaust valve? i have provided a link to my cold start, any help would be much appreciated http://youtube.com/shorts/m3-JcsPUelw?feature=share

12-26-2022, 03:46 PM	#2
ALMN Drives: 2SS 1LE M6, Palisade Calligraphy Join Date: Nov 2021 Location: Minnesota Posts: 181	You might have a Corsa rattle issue with the NPP exhaust. There is even bunch out there on youtube. Try to follow GM tsb on exhaust valve rattle fix, if that doesn’t work go underneath the car with a rubber mallet and identify where the rattle is coming from.

01-14-2023, 06:06 PM	#3
RED HULK Drives: 2018 Camaro SS 1LE Join Date: Jun 2019 Location: Bedford,NH Posts: 19	My aftermarket exhaust was getting hit by the driveshaft bolts. Only on hard downshifts. Wouldn’t happen with active rev match on. Heated up the pipe and pinched it with big channel locks and it’s good now.

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