The stock plug is PZFR6F. They are Double Platinum with a .32 gap.
If you are running copper/nickel plugs and want stock heat range, ZFR6f-11 will work. However, they come with a .44 gap. The MSP wants a .28-.32 gap, so you will have to bring the gap down a lot. Changing the gap that much can make for a somewhat uneven gap, but it will work. All NGK plugs with a -11 suffix will have a gap of approximately .44, which is too much. Changing the gap on platinum or iridium plugs is not a good idea.
If you are running a step colder plug, you should get ZFR7F. They are one step colder and come with a gap of .32. You can get them from NAPA for about $2 each, the napa part number is 5913.
