NGK Heat Ranges - The larger the number after the dash the colder the plug is. Example a R5673-7 is a cold plug where a R5673-10 is a very cold plug
weird. I know a few of you have tried the NGK R5671A-7... I gapped them to .028"... Anyone want a set? I bought a total of 12, so I have 6 brand new ones, if anyone in the bay area wants them, I'll sell them for $20 for the set of 6.
1x NGK V-POWER RACING Ref. R5671A-10 Spark Plug Equivalences : - NGK BKR10E / BKR10EVX / BKR10EQUP / BKR10EGP / BKR10EVX-11 / BKR10EIX / BKR10EIX-11 / IRIWAY 10 - DENSO K31R-U / K31PR-U / DENSO K31PR-U11 / IK31 / IK01-31