what is the best spark plug for RX8?
 

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.

I am using Mazda RX-8 with BRISK Racing Premium LGS Spark Plugs.
- 2 x BRISK Premium DOR11LGS Spark Plug
- 2 x BRISK Premium DOR12LGS Spark Plug

Oem is best. It really is. $20 per plug.

Thank you Sir, I asked about that in another thread.

some smart noob just pulled an almost 10 yr old thread up ...

Yeah. It's still a valid question though. Maybe I should just move this into the new member subforum.

*EDIT* not Brettus! Ash8* recommended Densos. Sorry.

Actually, Denso DOES work better than NGK, they last longer(much) and works better, it's just that most people got f off by it's higher price tag. (if stock NGK is not expensive enough!)

Try it, then you will know what I mean.

Oh oh,
another oil , premix type debate brewing?:)

i actually want to test the Brisk plugs see if they are any good....i got access to a dyno to see if there is any power to be gained of lost......

Everything is oem in my car... :)

Someone I know just tried the Brisk plugs. They are not built correctly and will not screw in all the way.

yea they sent me the wrong style plugs