Ok im going to change the spark plugs..what number should i use i.e. 9, 10? and i know to use ngk but what size gap should i use? thanks

you cant gap plugs for rx7's



if you ahve a stock car go with 7's and 9's.



part number

bur7eqp for trailing

bur9eqp for leading

walk up to the guy behind the counter and say "i need 4 sparkplugs for a mazda rx7 [insert year], 2 leading 2 trailing." They will then tell you what sparkplugs they have for that model/year of car. Choose from those. https://www.nopistons.com/forums/pub...IR#>/smile.png

ok this is dumb but uh what ones are trailing and what ones are leading?



should i ask the guy if he has titanium valves also?

oh yeah....... you might wanna go straigth to a mazda dealer..... cuz you might have a hard time finding them in your local car parts stores

leading are the spark plugs towards the bottom of the car, and trailing are the ones on top.

thanks

They come all together in a box from the dealer, with a picture of where they go even. https://www.nopistons.com/forums/pub...IR#>/smile.png

oh yeah......... one more advice... replace them one at a time.... you dont wanna accidentally switch wires and blow the engine

yeah dont need a blow engine the first weekend we get it