When you say "NGK 9's" do you mean heatrange 9?


Also read my other post alittle further down plz and see if you can help me out with that.

 

yep.... Typically, Mazda recommends 7's and 9's for leading and trailing.... However, that's for US cars... not sure what's recommended for Europe. Anyway, Most owners tend to run either 9's symetrically or 10's if they're running high boost.

 

Yes the heatrange is 9. On NGK the higher the number, the colder the plug.

 

NGK BUR9EQPs all around (L&T) for modded cars...

 

ok thanks very much