NPP Exhaust X-Pipe Question
Thread Starter
Instructor
Joined: Jun 2010
Posts: 129
Likes: 11
From: Treasure Coast Florida
NPP Exhaust X-Pipe Question
I have a 2009 with the NPP exhaust and have a question on the x-pipe. At the front of the X-Pipe are those CATs or resonators? If they are CATs I don’t seem to find an O2 sensor after them so how would the computer ever know if you change the X-Pipe out for one W/O CATs?
BTW I have not had the car long and have only been under it once.
Thank You
BTW I have not had the car long and have only been under it once.
Thank You
Safety Car
Joined: Nov 2007
Posts: 4,435
Likes: 874
From: Bay Area CA
I have a 2009 with the NPP exhaust and have a question on the x-pipe. At the front of the X-Pipe are those CATs or resonators? If they are CATs I don’t seem to find an O2 sensor after them so how would the computer ever know if you change the X-Pipe out for one W/O CATs?
BTW I have not had the car long and have only been under it once.
Thank You
BTW I have not had the car long and have only been under it once.
Thank You
Last edited by Mike's LS3; Dec 25, 2016 at 02:24 PM.
Thread Starter
Instructor
Joined: Jun 2010
Posts: 129
Likes: 11
From: Treasure Coast Florida
Merry Christmas
Last edited by dbletap_ed; Dec 25, 2016 at 03:37 PM.
Safety Car
Joined: Nov 2007
Posts: 4,435
Likes: 874
From: Bay Area CA
Thank you for the information. I have to assume those small CATs strangled some HP out of the car. To that end who makes a good X-Pipe which will connect the front CATs to the stock NPP mufflers? I really like the NPP system now that I have the Mild To Wild controller installed. In addition the system would sound even better when open w/o the extra CATs.
Merry Christmas
Merry Christmas
As far as the X pipe, I don't know if GM still stocks the original X pipe without the cats that came with the car or find one used.
Also, check the aftermarket exhaust companies, maybe someone will chime in with a company.
