we use (modified stage 2 plus);
DENSO IK01-24
or NGK
R7434-8
Both have the better electrode design, which reduces the chance of det damage and is a few heat ranges cooler.
STD setups or stage one:
DENSO IK01-22
or NGK
R7434-7
Better tip design but only one heat range cooler.
@huntersmob the denso plugs are of better build and quality generally as for life span i cant say.

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