like the title asks, do i need to upgrade my stock radiator for a 13b sp? and if so, can i use the mazdatrix 4 pass radiator with the stock water pump?

https://mazdatrix.com/product/radiat...2-race-4-pass/

 

Is your car having cooling problems?

Or is your radiator just getting rusty like mine?

 

No problems, Im just movi g from a 12a in my 82 to a 13b sp.

 

No.

 

ok so the other question, can the stock water pump handle the 4 pass radiator?

 

There is someone on here from Canada that just did this or a similar swap. Might search for his thread.

 

The Renesis swap thread? That guy is using a Koyo.

I don't think I've seen anyone use the Mazdatrix 4 pass radiator. Might need a different pulley on the water pump, but they do answer tech questions so I'd say email is your best bet.