Four of these then?
http://www.amazon.com/gp/product/B00...=ATVPDKIKX0DER
And a little antisieze and I should be all good for the plugs?
http://www.amazon.com/Permatex-81343...ords=antisieze
I'm still curious if using seafoam or another product is a good idea to clean all of the carbon buildup from the number of miles that has been put on the car.