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: Full Number of holes: 4 Diameter (mm): 232 Height (mm): 27 Thickness (mm): 10 Minimum thickness (mm): 9 Axle application: Front APPLICATION Brand Model Engine Value Power (KM) Year BOND EQUIPE 1.2 63-73 BOND EQUIPE 1.3 67-69 BOND EQUIPE 1.3 69-70 CATERHAM 7 1.4 91- CATERHAM 7 1.4 91- CATERHAM 7 1.4 91- CATERHAM 7 1.6 74-81 CATERHAM 7 1.6 81- 94 CATERHAM 7 1.6 94- CATERHAM 7 1.6 94- CATERHAM 7 1.7 86-90 CATERHAM 7 1.7 86-90 CATERHAM 7 1.7 86-90 CATERHAM 7 1.8 97-2002 CATERHAM 7 2.0 90- CATERHAM C21 1.6 96-2000 CATERHAM C21 1.8 96 -2000 CATERHAM C21 2.0 96-2000 FAIRTHORPE ELECTRON MINOR 63-67 FAIRTHORPE ELECTRON MINOR 0.9 67-73 FAIRTHORPE ELECTRON MINOR 1.1 67-73 FAIRTHORPE ELECTRON MINOR 1.3 67-73 GINETTA G15 0.9 67-74 GINETTA G4 1.0 61-69 GINETTA G4 1.3 1981 GINETTA G4 1.5 61-69 GINETTA G4 1.6 1981 GINETTA G4 1.6 61-69 GINETTA G4 2.0 1981 GINETTA G4 (DARE) 1.7 2000- LOTUS ELAN 1.5 62-63 LOTUS ELAN 1.6 63-65 LOTUS ELAN 1.6 65-71 LOTUS ELAN SPRINT 1.6 126 70-74 LOTUS EUROPA 1.5 82 66-67 LOTUS EUROPA 1.5 80 67-70 LOTUS EUROPA 1.6 80 69-72 LOTUS EUROPA 1.6 105 71-72 LOTUS EUROPA 1.6 126 72-75 LOTUS SEVEN 1.3 68 -70 LOTUS SEVEN 1.5 62-68 LOTUS SEVEN 1.6 67-70 LOTUS SEVEN 1.6 70-73 PIPER GTT 1.6 68-71 PIPER P2 1.6 71-74 PIPER P2 2.0 71-74 ROCHDALE OLYMPIC 1.5 63-73 TRIUMPH HERALD 12/50 1.2 63-67 TRIUMPH HERALD 13/60 1.3 67-71 TRIUMPH SPITFIRE 1.1 62-67 TRIUMPH SPITFIRE 1.3 67-74 TRIUMPH SPITFIRE 1.5 74-80 TRIUMPH VITESSE 1.6 62-66 TURNER MARK 2 1.0 61-63 TURNER MARK 2 1.2 61-63 TURNER MARK 2 1.3 62-63 TURNER MARK 2 1.5 63-64 TURNER MARK 3 1.5 63-66 TURNER MARK 3 1.7 63-66