Alright I have an 88 fc non turbo which I just had it rebuilt and street-ported. I'm looking to upgrade the cooling system on it but dont know what to go with anyone have any good idea's?

 

here are some good options for factory and aftermarket radiators.
http://www.mazdatrix.com/b8.htm

 

Fluidyne seems to be the best choice but a bit pricey, Koyo have nice units too.

I don't know about FCs but adding a second oil cooler for single oil coolers' FD is a good cooling system upgrade. You might want to dig it a bit.

 

i am yet to find an oil cooler that works better than the factory fc unit but i highly recommend the braided oil cooler lines from mazdatrix they are cheaper than factory, last longer and they are pretty.

 

whatever you get, make sure it has a metal top and bottom, several people have had the plastic top or bottom split open on their original oem radiators - myself included

dual pass rad should be fine for anything short of full road course racing