Turbo Groove automotive brake discs have a widened, arcuate slit that increases the flow of cool air, lowering the temperature of the brake pads and disc, while draining dust, dirt and hot gases better than a straight line, which can rust and become ineffective. Drilled holes remove surface gases when braking from high speed, while not weakening the structure of the disc as in through drilling. TECHNICAL DATA Type: Drilled and Slotted Full / Ventilated: Ventilated Number of holes: 5 Diameter (mm): 280 Height (mm): 118 Thickness (mm): 26 Minimum thickness (mm): 25 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Year CHEVROLET CAMARO (2ND GEN) 4.1 70-78 CHEVROLET CAMARO (2ND GEN) 5.0 70-78 CHEVROLET CAMARO (2ND GEN) 5.7 70-78 CHEVROLET CAMARO (2ND GEN) 6.5 70-72 CHEVROLET CAMARO (2ND GEN) 6.6 70-72 PONTIAC FIREBIRD 3.8 77-79 PONTIAC FIREBIRD 4.1 70-76 PONTIAC FIREBIRD 4.9 77-79 PONTIAC FIREBIRD 5.0 77-79 PONTIAC FIREBIRD 5.7 70-78 PONTIAC FIREBIRD 6.6 70-74 PONTIAC FIREBIRDAC 6.6 74-78 PIRONDAC 6.6 74-78 7.5 71-76 PONTIAC GRAND AM 6.5 73-75 PONTIAC GRAND AM 7.4 73-75 PONTIAC GRAND PRIX 4.9 1977 PONTIAC GRAND PRIX 5.7 76-77 PONTIAC GRAND PRIX 6.6 69-77 PONTIAC GRAND PRIX 7.0 69-70 PONTIAC GRAND PRIX 7.5 70- 76