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Ive used a few types of DENSO iridiums
IK20
IK22
IK24 (currently using)
HEAT RANGE INFO COMPARABLE
DENSO 16 20 22 24 27 29 31 32 34 35
NGK 5 6 7 8 9 9.5 10 10.5 11 11.5
CHAMPION 12,11 10,9 8,7 6,63,61 4,59 57 55 53
BOSCH 8 7,6 5 4 3 2
I used the IK22 last year, the white stuff ended up actually cracking and going through my motor. Currently on the IK24 with 20psi 400whp sr22det and theyre great.
only downside is that theyre $10 a plug. Not bad since I just came back from owning a rotary....$40 set of plugs ..which i changed all the time
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DODOlogic.ca
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