I have a 2010 Odyssey, went to change spark plugs, but autozone kept giving me these large thread "fat"plugs, while mine were very very skinny plugs. We went through several year models, and even tried typing in the part number for my skinny plug, but they assured me it wasn't for an odyssey.

After searching online, I do see 2010 accords have the skinny plug. So my question is, which vans had the NGK 5787 plug? or is my engine swapped with an accord?

 

Should be a VIN plate on the engine block on the back side. Will need to get under the van to see it. Green tag, up above the passenger side halfshaft. From that VIN you can figure out where the engine originated.