Hello everyone, I have a 2020 Mustang GT, fully stock. Just a catback and cosmetics. No tune or anything yet, I am planning on getting headers and CAI later on. But back to the point, I am looking to get new spark plugs, preferably NGKs. On CJPony parts they have 2 kinds, the (6509, which says for NA cars) and then there’s (6510, which says for boosted cars.) but also Autozone has these (4554) so what would be recommended for my car If I want to get the most and best out of but would also be...

Spark Plugs for Gen 3?