The Motorcraft and Autolite's are both the 2 piece design. The Brisk is One Piece, but one heat range cooler for Nitrous and/or Boost. In my nearly stock 06 I put the Champion 7989 One Piece plug in at about 60,000 miles. I have just about 127,000 miles on the car, they are still working fine. It killed me to switch to Champion, but I wanted the proper heat range - ruled out Brisk, and I wanted true One Piece - ruled out Autolite and Motorcraft. They have performed flawlessly, so I will stick with them. Since you aren't running Nitrous or Boost, I would run the Champion.