Hi guys, I was wondering if you have any opinions on which spark plugs are best? I have a 2007 rx8

 

OEM NGK plugs. Even the race teams use them for the most part.

 

Stock car...stock plugs (NGK's)

You can buy the Denso's if you want They are about twice the price and do not appear to have any advantages.....

Any other application there are other plugs out there...cooler heat ranges for FI and racing application...but they are pricey

 

What do you guys think of the Laser Iridium ones? I see those and the non-Laser Iridium ones?

 

They are the stock plugs

 

Oem plugs for sure.

 

got to agree NGK'S

 

NGK Laser Iridium plugs are OEM plugs. part numbers RE7C-L 6700 (leading plug) and RE9B-T 6701 (Trailing plug).

You're lucky I have a set sitting on my desk to reference.

Denso makes an iridium plug also. I am told it is a cooler spark, more suited to racing and sustained high RPM's then for daily driving. They are also expensive.

May as well stick with the OEMs. They'll last plenty long.

 

NGK Laser Iridium plugs are OEM plugs. part numbers RE7C-L 6700 (leading plug) and RE9B-T 6701 (Trailing plug).

You're lucky I have a set sitting on my desk to reference.

Denso makes an iridium plug also. I am told it is a cooler spark, more suited to racing and sustained high RPM's then for daily driving. They are also expensive.

May as well stick with the OEMs. They'll last up to 50k miles with a strong enough set of coils. They wont' be within spec by then though, so don't wait as long as I did.