HellsBells
620/677
Hi all,
I ran the NGK 7554's on my car, which are heat range 7. I'm upping up the boost and power and am wondering if NGK makes a colder plug than the 7554? Or if any other manufacturer has plugs in heat range 6 -- they have to be for the newer heads though.
Thanks!
I ran the NGK 7554's on my car, which are heat range 7. I'm upping up the boost and power and am wondering if NGK makes a colder plug than the 7554? Or if any other manufacturer has plugs in heat range 6 -- they have to be for the newer heads though.
Thanks!