Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
Spark Plug: Application and ID
SPARK PLUG TYPE AND MANUFACTURER
Primary ......................................................................................................................................................................................... RC10YC4 (CHAMPION)
Alternate 1 ................................................................................................................................................................................................ BKR5E-11 (NGK)
Alternate 2 ................................................................................................................................................................................................ BKR6E-11 (NGK)