do we need 02 extensions with this set up or not?

if so, were they included in our shipments?

thank you.

sorry, after more than an hour of searching, i found the answer to my own question..

http://www.g8board.com/forums/showthread.php?t=5572&highlight=kooks+install


And last but not least, the hardware kit. Only one O2 extension is included because the factory wiring is long enough on the other 3 O2 sensors. We also recommend you DO NOT use the Kooks metal header gasket unless your factory gasket is ruined. The factory gasket is a MLS steel gasket that requires no sealant, where the Kooks one is a single layer steel gasket that requires sealant. I have had the same factory gaskets on my GTO through like 5 header installs and still do not have an issue.