"The suitable spark Plug for Nissan Pulsar VZ-R (JN15 SR16VE) is NGK Platinum BKR6EVX.
The difference between BKR6EVX and BKR6EVX-11 is gap. The gap of BKR6EVX is 0.8 mm, and of BKR6EVX-11 is 1.1 mm.
Plug gap is decided with the generated coil voltage of each car. Generated coil voltage of VZ-R is lower than that of the car which BKR6EVX-11 is applicable. As continuing to use plugs, the gap would be wider as usual. It means if you use BKR6EVX-11, the possibility of misfire of spark plug would be getting more higher."