Visually, what are things you can look at to tell the differecnt between a S5 rotor and a S4 rotor. I'm looking to buy a set of S5 rotors for my N/A build up. Also...besides there being no exhaust port diffuser on the TII housings, is there anything else?
Thanks.

Marc

 

I dont think there is a way (visually) to tell if the rotor is S4 or S5 the only way to is weigh it. And you already mentioned the easiest way to identify between s4 and s5 housing.

 

if in case u are getting turbo housings just for the NO EXHAUST DIFFUSER they are removable form teh turbo housings and you can install them on a NA housing

 

I may be mistaken but... I thought the S5's rotor housing had a female threaded boss located just above the trailing spark plug for the knock sensor, while the S4's did not. The S4's knock sensor were located on the center piece.

Sensei

 

Weigh the rotors! Mazdatrix has a chart on rotor weight.

 

wieghing the rotors sounds like a plan..but im still gonna have to trust the buyer...i rebuilding my n/a s4, and im down a rotor and a housings due thanks to two apex seals. So i wanted to see if i could just get the TII housings in good condition, if not...i can swap diffusers then with pair of good n/a housing and some crap TII's or soemthing.

thanks.