I am having a hard time finding any long tube headers that are cheaper than $600..I was hoping to find something a little cheaper. And does anybody know, if I have to run a catalytic converter or do i need to buy high flow cats? Any ideas guys...

That is for a cheap pair, I wouldn't hold my breath for any that are cheaper.

D'agostino is having a 5-10% off sale for X-mas, maybe you can get 'em with the discounted price.

Here's some 304 stainless steel for under $400.00

http://cgi.ebay.com/ebaymotors/OBX-Exhaust-Headers-05-07-Ford-Mustang-GT-4-6L-V8-ALL_W0QQitemZ170063168548QQihZ007QQcategoryZ33631Q QrdZ1QQcmdZViewItem