I was making a search but i didn't find an answer for my question and is what is the diference with headers in a pro? it worth it? any improvements? thanx..

 

Pacesetter=crap dont buy, Genie makes some, call corksport for them, I have heard they have been on back order for a loooooooong time though.

 

i have had great luck with the AWR and OBX header both are in stock the OBX goes for $215

 

<~~~uses OBX. Very happy.

 

But what does improve?

 

power curve smooths out with much better top end power. DaveB uses the Obx header on his automatic p5 and claims he picked up almost 8mph in top end with that as the only mod.

4-1 design improves top end power with slight increases across the rev range. 4-2-1 increases the whole range also but with more mid-range power and less top end.

 

You can find headers for 3rd gen Pros on www.protegegarage.com
I think they're made by OBX. Anyway, you should check 'em out. They got a lot of parts for Mazda owners.