Well i have searched and searched with not to much info regarding my question; which is a good thing in a way lol. My question is with the ATI street damper (street version with alt. a/c and removable p/s pulley) is made with an aluminum hub. now my only concern would be that it's not steel (possible key wear on the softer aluminm hub?) The race version (only alt pulley) is also offered in an aluminum and steel hub. i think i have come to the conclusion that the aluminum hub is used to lighten the damper and does not effect the overall strength. i'm not sure so i though i would ask. any info, experience with the street ATI damper, or things you have heard; would be great if you could share. thanks

 

they're pressed onto the crank and uses the oem key/bolt. as long as you got it on right dont worry about it.