dude, stop spreading this misinformation before someone seriously trashes their engine. You have to use nuts, not bolts, and they go in the throttle body, not the oil filter. Christ.
Both right and bot wrong.LOL...oil fill, but I will defer to your expertise. Using the throttle body opening does indeed sound like a better method for this mod
When changing your spark plugs, be sure to pour some sand down each hole, before you put the new plugs in. A tablespoon full for each hole should be fine. This will help keep your piston rings seated.
These guys have no fear. Guns are pulled in support and protest. Grenades too. Check out the guy with AK
go to 1:16
Go to 4:56