F & R rotor and housing
 

How do you distinguish which one is front and rear rotor and housing. Any special markings? does it matter? it's confusing. Please help. Thanks!

One will say "F" and the other "R" on the top of the Housing.

^ True dat, but what's the difference? Are the cooling passages changed?

you need a special set of glasses that mazda sells to see the stamps.

the port air holes are reversed in the exhaust passages between F and R, everything else is identical.

how about the rotors? Do they have a stamp also which one is front and rear?

no

So, are you trying to say that "rotors" are interchangeable? My other concern is I just noticed the housing I bought are stamped "F" does it mean I'm f....ed up? what effects or consequences am I facing if both housing I am using are for front?

They are interchangeable.

The internal passages for emissions are different between F and R rotor housings. Other than that, you can build the engine with 2 "Front" rotor housings and be OK.

Yep. And if you want to keep the air injection, redrill the air hole.

yep, you can thread and plug the unused hole and drill the other side to be opposite the other housing.

Never listen to anybody that says they are the same and interchangable.....ever. They don't know what they're talking about.

I was wondering about the rotors... I thought the wear characteristics dictated that you'd want to keep front and rear rotors in the same place they were in. If they're brand new then you could interchange the rotors, right? Few people have that luxury though.

The above comes across as mean spirited and it shouldn't be taken that way. I should have added......................as long as they add the cavet about the air passages being different

no sense in getting that deep into it. the topic has been beaten to death over the years. search button is awesome. side note, how come you went with a new acct hailers?