So i tried looking for this before posting but didnt have any luck. When i do my exhaust, Rb header, resonator to muffler, what am i supposed to do with the egr valve? put it in the same spot its at even though theres no cats? block it off?

Thank you for any help!

 

You do not have a "EGR" valve. If you are referring to the ACV which is located on the side of the intake manifold then you block it off. If you are buying a new RB header then it will come with the block off plate and instructions. Make sure you use a good gasket with the plate or it will leak and causing running issues.

 

hmmm its where an egr valve was on my other car so i assumed thats what it was. it comes out at the end of the cats and goes back towards the engine compartment, is that the acv you mentioned??

 

There is nothing at the end of the catalytic converters.

This link will show you a picture of the ACV which is on the side of the intake manifold (intake portion that bolts to the engine.

http://www.mazdatrix.com/c-5.htm

Perhaps you are referring to the long metal tube that goes from the "Rear" of the intake manifold to the catalytic converter?

 

that might be it, if so what is that and whats its importants? sorry for the extreme noobness.

 

It supplies air from the Air pump to the catalytic converter for emission purposes. On the Se it also serves as the back pressure tube to activate the 5th 6th port actuators on the intake manifold that are for med to upper Rpm. For more reading about 5th 6th port actuators you can download a copy of your year FSM from the link in my signature or search with the terms, 5th 6th , actuator, or something of that nature.