i dono where this goes but. for my fc i am a bout to put lsd on it but witch ones should i put on it? i can ether get S4 clutch type lsd or the KAAZ lsd. is there a BIG difference between the two? or should i jst buy the s4. i plan on using it for drifting and auto X.

 

i believe the s4 was torsen (torque sensitive) and the s5 was viscous (viscous fluid). i think the s4s are the favored one and last longer than the s5 type.. the kaaz will cost a bit more, but thats another option.
www.mazdamark.com has an fc3s section with info. may want to double check me.

 

S4 is clutch, S% is vicous, I believe the KAAZ is Clutch as well.