two questions

are aluminium shoes any good ? what are advantages and dis advantages ?

and centrax clutch, are they just for on road or off road too ?

They're better than stock composite clutches in my opinion because they won't crack. However, the aluminum shoes can be tough on springs. If you are considering aluminum shoes go with the blue mugens with mugen 1.1 springs. Those springs hold up the best with aluminum shoes. I've stopped using three shoe clutch systems however. I now use Fioroni sliding turbo clutches. They are awesome, you should look into them.

Interesting,
A little pricey, but interesting
http://www.gsracing.com/gsracing/pag...id=10&rootid=1

i run my hyper 8-port with mugen 1.1's , mugen white clutch shoes, and an ofna 063 pipe. Works good to say the least. Kinda neat you can use other companies stuff.