Thread: ALs or NGK..

Not really...605 is basically a stock replacement...just a TAD cooler...so since you have a PCM and some exhaust mods...I'd say 605's are just fine.

I need to change the plugs in my winter ride. AL 605's work fine in a stock GTP?

yep ^^^

i have ran both al and ngk with same results. ngk seem to last a little longer IMO

Thanks warbeaver.

Originally Posted by Warbeaver

yep ^^^

i have ran both al and ngk with same results. ngk seem to last a little longer IMO

That's because they aren't a copper core based plug.