ok i have a 350 rancher and i was wondering how u get the spark plug booth of im not talkin about the spark plug it self im talkin about that wire or booth thats on top of the spark plug it is color red i think is it a snap on and off or u have to twist it off

by the way wat is a good NGK spark plug that will last for a good bit or i should just stay with the rugular one

 

Just twist, and pull, itll come off. But if you dont suspect a problem, you might want to leave it on. Repeatedly removing the boot, makes for a sloppy fit, on the wire.
You could go with the iradium tip NGK plugs. They are supposed to burn off deposits better, and should last at least 5 years.

 

Pay the extra money for a new Irridium plug, DPR7EIX-9! I get mine at http://www.sparkplugs.com/default.asp?KID=39


The boot should just pop right off. This is one of the easiest plugs in the world to change. It is right out in the open, not burried way down in the head like water cooled engines are.....