SFI crank pulley?
SFI is just a rating used to indicate whether or not a part is good enough to use on a racecar.
SFI ratings are only good to certain ET's.
If your looking for an underdrive pulley, just look at ones like powerbond,SLP,etc.
SFI ratings are only good to certain ET's.
If your looking for an underdrive pulley, just look at ones like powerbond,SLP,etc.
