How do you tell N/A rotors from TII rotors.
 

Finally got around to cleaning out the garage. I have two TII rotors and housings, but then i had another rotor lying around and i couldn't remember what it came out of. So, what is the easyest way to tell the difference between the two? Thanks in advance...

easiest is to weigh them then check the chart on mazdatrix.com Need a decent scale.

easiest way is look at the indent, turbo's are alot deeper than the na's

indent = bathtub