2003-04 Mach 1 Registry Owners Club - View Single Post

04azuremach · 07-06-2011, 10:41 AM

One step colder should be fine. I've used NGK before they weren't any better than autolite honestly.

07-06-2011, 10:41 AM	#22
04azuremach Loud, fast and fun Join Date: Apr 2004 Location: Owning Ricers at MIR Posts: 7,864	Re: plugs for 150hp nos One step colder should be fine. I've used NGK before they weren't any better than autolite honestly.