Stillen offers AP Racing big brake systems for trucks and SUVs that can return your big wheel/tire-equipped ride to better-than-factory braking performance. The oversized discs move the caliper's clamping force further out from the centerline of the rotating mass, creating greater leverage and increasing brake torque. AP Racing manufactures the AP7500 front brakes system for '07 fullsize GM 1/2-ton trucks and SUVs. The BIG kit has heavy-duty 15x11/4-inch two-piece floating rotors and massive AP Racing six-piston calipers to decrease the braking distance of the big SUV's. The upgrade stays compatible with the OE master cylinder and ABS system. All necessary brackets, brake lines and hardware are included in the kits.