NGK plug question,

muzz67, Oct 2, 7:14am
Went to get some NGK BKR5E-11 plugs, was given BKR5E"S"-11 instead.
Does the S make any difference? They appear identical dimensionally.
For an old Courier farm truck.
Cheers.
kazbanz, Oct 2, 7:42am
DONT take my word as gospel but I thought there was an extra built in suppressor or resistor in the S
jmma, Oct 2, 8:02am
The letter “S” indicates a copper center core
franc123, Oct 2, 11:46am
As above, CC plugs. Your engine isn't going to care about it.
muzz67, Oct 2, 1:32pm
Thanks guys ,appreciated.
gph1961, Oct 2, 3:29pm
means extended center electrode
jmma, Oct 2, 4:07pm
pauldw, Oct 3, 2:21am
Can you even get an NGK plug without a copper core? The ES is a standard plug, the E is V groove centre electrode. https://ngk-sparkplugs.co.th/product-knowledge/basic-knowledge/spark-plug-characteristics/
kazbanz, Oct 3, 9:07am
There ya go I learned something--I was darn sure the S was suppressor in NGK code
gph1961, Oct 3, 2:52pm
E=1.5 mm CE(V-groove CE)
S=stand.2.5mm copper core CE
franc123, Oct 3, 3:15pm
No that is covered by the R earlier in the code, R being resistor.
supernova2, Nov 10, 4:06pm
Much more up to date NGK data
https://www.ngkspark.co.nz/products/spark-plugs/
Scroll down a few pages to get the chart