i bought some a while back. they are .4 mm ultrafine part number ITV24#4 / 5341#4. does anyone else have them and should i trade them out for my stock ones? there is nothing wrong with the stock ones but if these work better or are just better for the engine then i want to use them. i also have the mods in my sig so that was another factor in why i wanted to change out the plugs.