I've had a set of plugs for my F350 with a V10 for over a year - and just looking under the hood and the fact that I need a step ladder to do more then change the air filter makes my knees weak - and I'm 6'4". Then the fact that half of the engine is buried in the firewall even worse then my '31....... Those plugs are also $12 each and the required COP boots are $4 each at net prices makes for an expensive tune up. Then my wife's Escape - you actually have to pull the upper intake to change them - but those plugs were cheap - the intake gaskets weren't.