What is the difference???
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
What is the difference???
Between headers for 97-00 and 01-04? I know there is something different and would really like to know what it is. Can you help enlighten me?
Thanks.
Thanks.
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Since you refer to headers, I'll answer with respect to the application of aftermarket headers to different MY C5's. There are some differences in catalytic converter and pre-catalysts (pup cats) depending on the MY and model of C5.
The mount for the Air Injection Reaction (AIR) system which supplies fresh air during cold starts for emission purposes is different due to the change from fabricated stainless tube exhaust manifolds in the earlier model years to cast manifolds in the later years. You can see the small flange and tube welded to the #6 primary (2nd from rear) on my passenger side header in the pic below. This is the position for the later model C5. The earlier model has the AIR tube inlet welded to the rearmost primary.
Also, the earlier models have the threaded boss for the dipstick mount welded to the #6 primary while the later models have the dipstick mounted directly to the passenger-side head.
The mount for the Air Injection Reaction (AIR) system which supplies fresh air during cold starts for emission purposes is different due to the change from fabricated stainless tube exhaust manifolds in the earlier model years to cast manifolds in the later years. You can see the small flange and tube welded to the #6 primary (2nd from rear) on my passenger side header in the pic below. This is the position for the later model C5. The earlier model has the AIR tube inlet welded to the rearmost primary.
Also, the earlier models have the threaded boss for the dipstick mount welded to the #6 primary while the later models have the dipstick mounted directly to the passenger-side head.
Last edited by Patches; Jun 4, 2005 at 11:22 AM.
