#1 spark plug pulled @ 54,0000 added Counterfeit NGK plugs?

[MyStang]

Any input on reading plugs? Stock plugs @ 54,0000 (CYFS12Y) Gap still @ .052 using feeler gauges.
Motorcraft or NGK?
18 manifold, GT 350 cold air/throttle body, Hp tuners.

Sponsored

 

[babrams3]

Go with NGK's on the replacements

 

[MyStang]

On the way
NGK iridium ix spark plug ltr6ix-11
What would be the best gap for the plugs, thinking .050.

 

[Cory S]

On the way
NGK iridium ix spark plug ltr6ix-11
What would be the best gap for the plugs, thinking .050.

.048-.050" yep.

 

[ice445]

Looks pretty normal to me.

 

[jacknifetoaswan]

.048-.050" yep.

Just replaced mine last weekend with the NGKs at .050". She runs perfectly.

Well, other than the giant cloud of oil smoke on first start because my #8 plug well tube is leaking oil, but...

JR

 

[MyStang]

Darn internet has me double guessing my purchase!
Any one with a picture of a genuine NGK iridium ltr6ix-11 spark plug?
I may have received a counterfeit set.
Taper shoulder has NGK I I I I I I I LTR6IX I I I I
HEX has U1Z8 stamped on them.

 

[Zrussian13]

These are 6510s but should give you something to compare too. Don't mind the orange tips. I run a shit ton of octane booster.

 

[MyStang]

Zrussian13,
Thanks feel better now!

Sponsored