I just blew my rear rotor again. lol and i have s5 t2 3mm rotors,and counter weight allready,my question is is do i need a s5 flywheel also? or will the s4 one work?

Yes I searched but some said aslong as its a turbo flywheel it will work aslong as you have the counterweight for the s5 rotors wich i do

but then i look on mazdatrix flwheel description page and the s4 flywheel is 27 lbs and the s4 only 23 this is why i ask dont want to thro my rotating assembly out of whack thanks

 

You get the flywheel for whatever weight the rotors are. Of course front counter weight matters as well.

 

Most aftermarket flywheels are balanced to itself, and then you bolt on the appropriate counterweight.

OEM flywheels have the counterweight built in.

Front and Rear counterweights must match the rotors.

 

ahh so i have to use either the s5 flywheel or an aftermarker one...

so the rear counter weight is built into the stock flywheels? no wonder i always got thrown off with aftermarkets and all the auto counter weight stuffs.



also then i would use s5 rotors s5 front counter weight and s5 flywheel... and if i wanted to use an aftermarket flywheel i still use the s5 front counter weight and the supplied rear counter weight with the aftermarket flywheel correct?

 

yes if the aftermarket flywheel comes with a counterweight, which most do not, in which case you will have to buy a s5 auto rear counterweight

 

Yes, you buy them from an automatic car from the year. S5 motor, S5 auto counterweight. vise versa. S4=S4.