Just Took the plugs out of the Race bike. The ones that are in it are cr10ek. The ones I’ve bought for it are cr10eix iridium. (These were the listed ones in the book) Just wondering which would be the better option. Should i just replace with the same as what came out of it. Or fit the new ones ive got. The bike has a good bit done to it tuning wise. :thumbsup2: