@log1321 aqui nomeclatura Denso
http://www.globaldenso.com/en/produc...ket/plug/spec/
SK16R11
SK+ --- 14 x 16 (0.7mm diameter miniature iridium plug)
Heat Range 16
Internal Construction R --- With Resistor
Gap 11 --- 1.1mm (.044'')
SK20R11
SK+ --- 14 x 16 (0.7mm diameter miniature iridium plug)
Heat Range 20
Internal Construction R --- With Resistor
Gap 11 --- 1.1mm (.044'')
La diferencia es que SK16R11 disipa menos el calor en el bloque que la SK20R11.
Aqui dejo la explicación
http://www.globaldenso.com/en/produc...nge/index.html