Stage II spark plugs

[CFI]

What kind of spark plug are people running on Stage II? It’s time to replace mine and no one around stocks the Nology G4YS plugs that DMCF installed. I was thinking of using NGK 3186. Anyone have experience running this plug?

[Chris 16409]

From what I’ve heard and my personal experience, the OE Bosch silver spark plugs are the best. You can get them on RockAuto for about $5 a plug. The part number is HR6DS.

[CFI]

From what I’ve heard and my personal experience, the OE Bosch silver spark plugs are the best. You can get them on RockAuto for about $5 a plug. The part number is HR6DS.

Yes, that’s my understanding as well. However, I think there’s a reason why DMCF used Nology plugs. Different heat range? Different gap? Whatever the reason, I’d like to match the Nology plugs.

[Patrick C]

From what I’ve heard, the quality of Bosch is suffering in recent years. I am currently using Autolite XP103 Iridium XP plugs gaped at .024 (at the suggestion of DPI) and they are performing fantastically. Available on Amazon Prime and probably in all auto parts stores.

[CFI]

From what I’ve heard, the quality of Bosch is suffering in recent years. I am currently using Autolite XP103 Iridium XP plugs (at the suggestion of DPI) and they are performing fantastically. Available on Amazon Prime and probably in all auto parts stores.

Awesome, thank you. Found some locally!

[Patrick C]

Awesome, thank you. Found some locally!

Great! Gap them at .024 and you’ll be set!

[RamblinDMC]

I run NGK plugs. Before, with the OEM style Bosch ones, I always had a weird stumbly misfiring idle. The NGKs have been rock solid!