Ok changing out plugs at work, and I have new champion RS14YC plugs, but I pulled out split fire SF2D.
Here's the dilemma,

The threads on the split fire are shorter, and the champion are longer, quite noticeably. 3/4 in diff.
Want to make sure these are the correct ones before I turn it over.

 

doesn't sound right to me

 

I know what happenned, the idiot at the store looked up the lightning plugs....
Thank god for Walmart...
Made it in time before close, with right ones in hand

 

That's good that you seen that before you put them in. Don't wanna think bout that lol