I need to replace the header pipe that fits between the exhaust manifold and the catalytic converter on my 78 280Z. I ordered a Bosal pipe from Autoparts Warehouse but they canceled because of no stock. Does anyone know where I can purchase a stock pipe with flanges and no cutting and welding required?

I think you are making reference to what some folks call the exhaust downtube...See the following url:

http://www.atlanticz.ca/zclub/techtips/explodedviews/280z/exhaust%20and%20muffler%20L28%20cal%20dec%2074.gif

Item #1 in the picture would be the item you are talking about...

webdawg1

Try this:

http://www.atlanticz.ca/zclub/techtips/explodedviews/280z/exhaust%20and%20muffler%20L28%20cal%20dec%2074.gif

WebDawg1 = You are right. it is item #1 - the exhaust downtube

SBlake01 - do you know where I can get one?

Here's a used one

http://cgi.ebay.com/ebaymotors/DATSUN-240Z-260Z-280Z-EXHAUST-MANIFOLD-AND-DOWN-PIPE_W0QQitemZ110114043677QQihZ001QQcategoryZ33632QQrdZ1QQcmdZViewItem