Quick easy overview on how you'd go about removing, gapping and reinstalling your spark plugs. I recommend using copper plugs, I used NGK 7787. Ive heard TOO many issues with using Platinum and Iridium plugs in the 1GR-FE from what Ive kind of concluded that there isn't enough voltage produced in Coil packs to 100% properly arc the plugs. Feel free to try for yourself whatever plugs you'd like but the coppers work fine and do their job. If you have any questions at all feel free to drop a comment and id be glad to walk you through it!