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Spark Plugs
An explanation of a spark plug number,
BCPR6E-11
B = Thread Diameter = 14mm
C = Construction = Hexagon size = 16mm
P = Construction = Projected insulator type
R = Construction = Resistor type
6 = heat rating (2 = hot - 11 = cold)
E = Thread reach = 19mm
11 = Gap width (8 = 0.8mm - 20 = 2.0mm) = 1.1
Another format
PFR6A-11
P = Plug type = Premium platinum
F = Metal shell size = 14mm diameter - 19mm reach - 16mm hexagon.
R = Construction = Resistor Type
6 = Heat rating
A = firing end construction = special design.
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