(See my injector thread for details).

Denso Plugs or NGK? (just looking on Rock Auto and I recognize most of these as OEM Japanese car products.

Hitachi, Denso or NGK Coils?

Thanks!

 

I believe
Plugs - NGK
Coils - Hitachi
That being said their might be secondary suppliers or other suppliers at various times in the during the Fits life. Hitachi has a coil plant in Mexico so it makes sense that it would have been supplying the Mexico Fit plant with coils.

 

Thanks. I see on the RockAuto web site the Hitachi says 'Made in Mexico' in one of the pics (but is labeled 'premium'). Looks like the higher quality NGK Iridium plugs are the OEM Also.

 

The manual for my 2018 lists both NGK and Denso part numbers for spark plugs but I have no idea which is actually installed in my car.

 

I know both are considered high quality plugs. Going with the Iridium NGK high performance (looks like it's got the two thin wires on either side of the gap).

Some cars are VERY sensitive to certain things (old E30s needed specific plugs...people putting Platinum plugs in would have issues).