Does anyone know if RX 8 can has the best preformance in which of the following plugs:

1.NGK iridium plugs
2.BRISK plugs
3.HKS Iridium plugs

if not those 3 which ones are the best?? can anyone help me on this subject..

Thanks..!!

Per RB there are no park plugs available besides the OEM NGK.

http://www.racingbeat.com/FRmazda4.htm

Generally it is best to use plugs from the same country of manufacture. This is because the engineering staff and development staff will most likely have joint discussions and engineering. Especially with the RX8 use the NGK. If Mazda had recomended a Nipondenso I would also use them. For a American product use AC, Autolight, or Champion. For a Europen product use Bosch. Other plugs will just do a educated guess cross reference.