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1999 Forester, EJ253, SOHC-Correct plug?

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Old 11-29-2007, 12:22 PM
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1999 Forester, EJ253, SOHC-Correct plug?
The owners manual calls for RC10YC4 Champion or BKR5E-11 NGK plug. When I go to manufacturer or vendors (including Subaru parts) websites or cross reference charts, I get NGK BKR6E-11 as the listed plug most of the time. Some sites indicate that I have a DOHC engine so this could be the difference. I would rather use the colder plug (NGK 6 than the 5 range). Are these plugs interchangeable for a daily driver-city and highway?
Thank you.
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Old 12-05-2007, 03:05 PM
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Car Info: impreza wagon!!!
Some times they use superceded part numbers... just a thought
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Old 12-05-2007, 07:07 PM
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Car Info: 1996 impreza 60 trim, 8psi 201 whp, 213 tq 200k mi
the part number for the plugs you are supposed to have in your car are (subaru part number) 22401aa310
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