Hello. I'm new to the forum and still figuring where to post my query. I want to buy some replacement plugs for my 2018 450 HO and prefer to get NGK, but don't know their part #'s. I've been reading on forums that a lot of riders/owners prefer NGK, and I've not heard great things about Polaris' factory plugs. I've got one starting to foul now but still have a factory replacement until I can find the NGK's. Any help is appreciated.