My mechanic said the rx8 plugs are better. He said this along time ago, i haven't talked to him for awhile.
Does anybody know why?
Do they come in heat range of 9's?

I plan on changing my all 4 plugs to 9's. Sould i go with the rx8 plugs?

 

Just stick to the fd ones. Just get platnuim 9's for all 4.

R.K.

 

wow, girl in the pic is hot ^^ anyway, back to topic, dont know if rx8's are better or not, but i was told to use copper plugs, they dont last as long but i heard they were better to use....

 

^ did she get distracted or something?

 

With your mods, all 9s would be fine. Or at least recommended.

 

to bad my rx-7 didnt come with the same options as yours or id have one of those seat warmers also!! nice girl...i mean car.

 

Strange in that on the RX-8 forum, people were trying to use our plugs at one time. I'd just worry that the side electrode (arm looking thing) on the leading plug (rx-8 plug) might knick the apex seal if tightened to much so I'll stick with all 9's in mine. I use the copper ones as well since I change mine often.

Tim

 

I just installed 4 of the Rx8 spark plugs RE9 type and they are shorter than the fd spark plug so the electrode won't touch anything, the car start up fine and idle the same to me, I guess I will have to drive to see.

 

Work at a mazda dealer and heard the rx8 plugs arent cheapYea just stick with NGK 9's

 

You can get the RX-8 plugs on sparkplugs.com for $20 a piece...otherwise its something like $50 each for the leadings and $30 each for the trailings from Mazdatrix or the dealer...

 

i got a new pair of NGK 9's and the car flooded twice in a week. i had rx8 plugs lying around so i thought id give em a try. engine hasnt flooded since.

 

it might not matter. NGK's just went up in price this year. i think the standard BUR9EQ's are around 15.50 a plug now. a colder plug will prob run you even a little more than that

 

damn I guess I should sell my set instead having it laying around make some money, anybody want a set of new Rx8 plugs?
khris

 

I just paid $5 a piece for the BUR9EQ's from Advance Auto.

 

howd those work out for u?