NGK spark plug 6509

[Bigred911s]

Ordered these to replace the stock plugs which have 46k miles on them.
My 2016 is a S550 N/A, auto with Lund 93 octane tune .

What gap should I run?

Stock calls for .049 - .053 and I read these come gapped .044 put of the box.

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[MasterCylinder]

Curious as well.

 

[ugstang17]

Ask your tuner. That would be your source. John @ Lund will be happy to help. That is what he is there for.

 

[scrubber3]

Curious as well

 

[sloppymax]

The 6509 or LTR6IX-11 is gapped at .052" per NGK. Unless you see any damage to the cardboard cover, you should be good.

 

[GregO]

Wide gaps place added stress on the coils over time.
Personally I tighten up the gap to .038”, it cleaned up the idle and helped with throttle response.

 

[Burgo]

The 6509 or LTR6IX-11 is gapped at .052" per NGK. Unless you see any damage to the cardboard cover, you should be good.

The -11 on this plug means it is gapped at 1.1mm or 0.043" not 0.052"

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