Squashdaddy
Go Kart Champion
As the title states, I am wondering if it is OK, or if anyone is running these plugs with an APR (or any) stage II tune. I was under the impression that this is the plug APR recommends, but that may only be for K04 users. I am currently using the BKR7EIX. Not sure if I should return them or use them. I would be setting the gap to .024 as APR recommends.