The slotted rotors on all scat packs is that way on the passenger side, but. This is a solution that has been adopted in recent years by many carmakers for the. Maserati Brake Disc Rotor Maserati, Music record, Music Caliper orientation brembo calipers are directional, due to the use of differential piston sizes. Brembo slotted rotors direction . Offers the highest initial response of all the available disc face types while continuously refreshing the braking surface and being also typically a bit lighter. Brembo sport slotted brake rotors are sold in axle pairs and the easiest way to verify correct usage is to install the rotors on the side of the vehicle that results in the end of the slot nearest the outer edge of the rotor always contacting the brake pads first. Additionally, all of brembo's slotted discs are directional as well, regardless of the vane geometry. Brembo sport slotted brake rotors are sold in axle pairs and the easiest way to verify correct usage is ...