HPM made a name for themselves with their Megabite Jr.
LCA's. They change the location point of the axle end, changing the Instant Center, so the tires plant themselves better under acceleration load. But in so doing, they introduce Roll Steer, meaning the rear axle no longer stays perpendicular to the centerline of the car when the body rolls. That's not something you want if you're into cornering, but the better bite is something you do want if you're drag racing. They're not bad arms for their intended purpose, which is straight line.