Kooks to Corsa exhaust noise?

[rikkoboy]

Hello all. First time owner of a 26 Coastal blue CT5V blackwing. Hoping I can get some help here. I purchased the kooks 2” headers with non catted mid pipes and the x pipe. Paired with the corsa cat back. In touring mode. The car sounds horrible. Almost like a harsh vibrating /rattling noise when slightly reving . Curious to see if anyone has seen or delt with this issue. Cannot get Corsa to call back or get them on the phone. Any help is appreciated.

 

[rikkoboy]

 

[CBH]

Sorry to hear that. I can't recall any other similar complaints.

What's it like in loudest mode ?

 

[rikkoboy]

Loudest mode sounds fine. It’s only with the valves closed.
Are you able to hear the noise in the clip?

 

[kadowaca]

how many miles have you put on the car since the install? i am curious if you are getting blow-by on the valve which might explain the rattle - wouldn’t happen in v since they’re open. this usually throws a valve error code at some point.

also, separate from your issue but useful info - i am running stainless works headers cat deleted and never got a CEL - i have about 600 miles on it since install.

 

[rikkoboy]

Maybe 3-6 miles. Car only has 50 miles total.
no check engine light or codes but if I keep it in touring and drive it. It acts like at a certain rpm it opens the valves. Corsa’s customer service sucks