Slight misfire after changing plugs..thoughts?

Changed the plugs on my 750 today @ 79k miles. i ordered NGK BKR6EQUP iridiums but didn't notice i actually received the IZFR6H11. the BKxxxxx is a multiground (4 prong) plug and the IZxxxx is a single prong. The IZ is rated as an OEM replacement for the 750, but it didn't run all that great when i got it out on the highway and actually misfired once while at about 90mph.




Is anyone else running this plug? Any issues? i think i may take them out and go with the BK's that i ordered originanally. i ran them on my e38 and never had an issue.


Thanks in advance.

Send them back and get the right ones. Those clearly aren't working correctly. I'm running the BKR6's and love them.