Which crank Pulley is better or is there really not a difference?

 

i believe most everyone prefers ASP

 

I think ASP is aluminum and has both sfi and non-sfi pulleys.

SLP/Powerbond is steel, heavier, and has taller collars around the belts so they are harder to throw.

I am not expert on this, but there are threads where people say they get false knock problems with the ASP. I don't know if that's true, but it's out there.

 

if you plan on getting the slp dont....go with the powerbond instead. it's literally a carbon copy except w/o the slp logo on it, making it like $30 cheaper.