What do you guys recommend? Ive looked at the NGK website and its saying BR10s? A bit extreme for an NA aint it? :xconfused
depends how you drive, if you drive normal ( for a rex 0 ) then I would use BUR7EQP and BUR9EQP. This is the set up I use, I think it is the original set up when the car was new as well.
I would guess the plug requirements for a turbo will be different than for an NA engine ? Mazda usually give a range of plugs with a standard plug and the one hotter for those who like to plod along and one cooler for those who don\'t. If its standard stick with what Mazda say. If not consult one of the engine experts. The may even sell the plugs cheaper than you can buy them for elsewhere.
Got a feeling I was using 10\'s in my Egi, never had any problems though, the car was a little modified though.