Hi all,I'm probably sounding like an idiot, but I have an "83" 7 & I would like to know, what "port" is it? Also, what is the difference between a "bridgeport","streetport" & whatever kind of "ports" that are available. I'm just not up on it...please educate me.THANKS :dontgetit:

 

Your motor is a 12A with stock ports: 4 intake and 2 exhaust. Here are some explanations of porting options:

http://www.mazdatrix.com/faq/porting.htm

http://mrmazda.members.atlantic.net/....html#APORTING

 

even better still, here's what they look like



mazdaracing.com

 

And the good news is you can PORT it HUGE and get BIG POWER. The bad news is, you can forget about a decent idle or low end power. But the power on top will make up for it all.



Unless you care about Mileage or Emissions.