My Ford dealer wants $500.00. What a difference a different part of the country makes. By the way guys not to be nit picky, but the cheaper thread inserts are called heli coils, not heli cats. Hell cats were I believe a 2 nd world war air plane fighter group. Also yes on the Motorcraft sparkplugs. Had a thread problem years back on my fleet of Harley Davidson twin cam bikes. The fancier plugs that the service guy before me bought, 12 of them, we're useless. They wouldn't even thread in. From that day on I only bought my plugs direct from The Harley dealer here in San Francisco. Harley at least had the sense back in 2000-2006 to put enough threads in their cylinder heads. Still blows my mind how a machinist designed a cylinder head, and cast it with half the necessary threads. On top of that, it never got corrected till 2004 for the F150, and 2005 for the Expedition, both the new 3 valve motors. That design started a whole new group of issues but you all know that nightmare!
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