I need help iding this header. I was told its for a 12a, but thats all i know. I would to find out the year and if it will work on my car. I really only need it to bolt up to the engine properly. I have a shitty pacesetter header that came with the car, and I've done the rest of the exhaust up custom. So I'm not expecting it to be just bolt in. But would there be any fitting issues? I have an 83 engine. Here are some pics (sorry for the quality)

 

looks like the header and silencer for a 79-80, but it should fit youll just have to fab an exhaust afterr the silencer.

 

Thanks.

 

Pull the pace header off and see if the mounting holes are the same for both headers. If its the same your good to go...just make sure you have a new gasket when you put it back on, dont want any crappy exhaust leaks!

 

Measure hole spacing distance. 12cm is 12A, 13cm is 13B. Mazda was pretty smart when they designed these engines. I also like the 360mm circumference of the main drive pulley.