Originally Posted by AP Racing - Chris_B
It would be completely unexpected as the calipers and strap drive discs both have features to eliminate pad knock back.
Curious what features are in the AP calipers for knockback. Ironically, I ran your AP knockback springs in my stoptech's. They helped, but did not completely eliminate the horrible knockback from the weak nissan hubs. Nothing like coming out of the corkscrew and having your pedal go the floor at the next brake zone.