Just orderd a d16 racing header off ebay. cant wait till it gets here. my cars finally startin to come around.

 

Grats

 

'grats... now get a cat-back

(side note: are you converting to an ex/si exhaust? Or are you running catless?)

 

i want full exaust

 

so if i buy a header i have to buy a cat and **** or what.

 

Well, your dx has a odd cat configuration. It's built into the exhaust manifold. Since you already have the header, you'll need a catalytic converter, and then get a cat-back exhaust system for a full exhaust configuration.

 

one of my buddies has a 01 eclipse and he put his header on and he has a problem with his CEL being on becuase of the 02 sensors and its burning really rich. and its loud also. is mine going to be like that

 

If you make the same mistakes, then yes.

 

what mistakes did he make?

 

Is he using an o2 plug? is he catless? did he reset the ecu?