SP542 Thread

[Donovan]

My tuner says .024 just to be ultra sure but who knows. After I removed the tune, I had no more check engine lights

 

[mad man]

Until I notice some problems like buckling or miss firing, I’m not touching my plugs. I got 35,000 miles on a 2018, Plus I installed a custom tune 7000 miles ago, no problems. Which one is it?
J , lol

 

[Trackar]

My Local dealer has sp542s still but not sure I want to pay $17 a piece

 

[Donovan]

17 a ******* piece???

 

[Donovan]

Until I notice some problems like buckling or miss firing, I’m not touching my plugs. I got 35,000 miles on a 2018, Plus I installed a custom tune 7000 miles ago, no problems. Which one is it?
J , lol

This is in Maryland but tuner is Frank Smith

 

[ljn21]

What is the NGK equivalent of the 542s/m-12405-35t...6510?

 

[TheInfamousDrew]

Hey guys, does anyone know where to source the SP542 now? I can't seem to find anyone who carries them.
If not, has anyone found a suitable alternative since the 578 isn't the same plug?

 

[ljn21]

Hey guys, does anyone know where to source the SP542 now? I can't seem to find anyone who carries them.
If not, has anyone found a suitable alternative since the 578 isn't the same plug?

Ford sells them as a Ford Performance kit now (pack of 6). m-12405-35t.

Im still looking for the NGK equivalent part number if anyone knows.

 

[TheInfamousDrew]

Ford sells them as a Ford Performance kit now (pack of 6). m-12405-35t.

Im still looking for the NGK equivalent part number if anyone knows.

Awesome! Thank you

 

[Gsteve]

cant seem to find any