Seat Correction Angles

On 8-valve SOHC exhaust valves, use 15-degree stone and 75-degree stone to narrow seat and 45-degree stone to widen seat. On 8-valve SOHC intake valves, use 15-degree stone and 60-degree stone to narrow seat and 45-degree stone to widen seat. On DOHC and 16-valve SOHC intake and exhaust valves, use 15-degree stone to narrow seat and 45-degree stone to widen seat.