Here is a pretty good walkthrough of how to install headers and high flow cats:
http://www.zchickz.com/header1.htm and I've got a doc file that i will try and attach as well.
Another good website on how to install Nismo headershttp://
www.350zforum.com/tech/....aspx (this one btw looks freaking complicated!!!)
And the attachment is how to install the Crawford Headers.
I was told from someone that has installed 2 sets of these headers on the Z that "if you use a extension then the torque numbers will be off" cause an extension was the only way to torque the bolts on the headers, he just said to make sure they're tight.
Modified by koolzero at 11:05 PM 12/7/2004