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What spark plugs do you guys use in your 2nd gen? I have a 2005 and I'm replacing all the plugs. The ones that O'Robberies supplied are completely different design compared to the ones that came out.
O'Robberies: E3.53 Plugs
Original: Motorcraft PZK14F
I used Motorcraft Spark Plug - SP546X. Installed this April. 2006 XLT. No issues. (I used Autolite HT1 back in 2013 as I didn't trust Motorcraft after 6 of 8 broke coming out. Never had an issue with the Autolites.)
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