This might be a dumb question, but here it goes anyway.. I have a 2004 175hp ficht engine that calls for XC12PEPB plugs, stock number 955. Here is my question. When I get these plugs from a dealer, (which is 60 miles away) the box says Marine and if I get the same plug/ spark plug number at a auto store or order it over the internet it comes in a plan champion box and doesn't say marine. Are they the same? Or do they make one for autos and marine motors? I do index the plugs.