7:th-Jul-2016, 08:19:47
(6:th-Jul-2016, 22:07:48)tucpal Wrote: they did use gm stamped champion plugs but they were changed for ngk at some point
think they should be 55576026 but that may depend on year of manufacture
rusty may check for you
Thanks for the info.
Just a bit concerned they're not the right ones.
Think I'll fit the correct set.