They only have the specifications for the N/A FS, not the F/I FS. And that's wrong anyway. I think the N/A FS is .042". You should return them and get another set, then set the gap at .028". I dealt with the same problem for a bit. It was driving me insane. I'm an ASE certified tech and Service Manager and all my information (AllData, Chiltons, MOTOR) said .042", but that was wrongly listed. I would be fine for a few days, then I'd get fuel-cut. Finally, after EVERYTHING, I was informed (on here) what the gap was actually supposed to be. After correcting that, it was fine.