Originally Posted by
wichitafc98
I think that the OS thread is different than the Nova thread on plug. It might strip It might have a different height on the plug. I try to always run plugs of the engine.
3 years ago I had this same question. My lhs didn't have nova plugs, only O.S. I bought OS 6 plugs. When the time came to use one it didn't go in as smooth as a nova plug, but went in without hurting the head. I've been using OS plugs in my .12 engines since. Another time I didn't have an extra plug and needed one. I asked someone for one, he was running a novarossi, and he handed me an OS plug. At that point I felt a lot better using the OS