I can only go by what they tell me at the dealer while I am there. Its not like I have internet at the service dept and can compare prices.

You're sourcing plugs through a dealer?? No wonder they're ridiculously expensive...

no kidding... you can always find it cheaper somewhere else.. no point in going to a dealer for a common item like that

omg . I didn't know that was possible. They must be like quad platinum coated inside and out lol.

No they installed the supercharger so I had to have them do the spark plugs.

That still doesn't make much sense to me... granted I'm not all that familiar with a SC 3800, but I would still suspect that the plugs are going to accessible with or without the SC. what does replacing it have to do with the plugs?

I'd still vote NGK TR55 plugs as replacements. What are in there right now? Can you pull a boot off and read what brand and type they are off the label on the ceramic?

He doesn't own a L67. I'm guessing this is for his F-150, since they're (supposedly) Roush plugs and his truck is supercharged... Yeah, 100 bucks for spark plugs is ridiculous. I think most regular plugs are around a buck or two a plug? Sounds about right. Sorry, bud, but it sounds like you got ripped off...

My bad, no L67...

Anyway, I found Roush'* home page (or a page) and they have a pic of a plug that sells for $18. 18 Friggen bucks. For a plug. Ouch....

http://www.roushperformance.com/news...l_story&sid=98

Very bizarre plug.
Looks to be one step colder than stock.(HT1)

http://www.sparkplugs.com/results_cr...=ht0&x=65&y=18
one of the few places I can get my NGK BKR9'*

Yep The dealer gave me a break on the cost and labor. What happened was I had the supercharger installed but it required premium fuel but I only had a full tank of regular. Well being the smart guy I am I added 2 containers of octane boost 104 to make it premium. Big mistake fouled my plugs up big time and the truck engine ran terrible. Dealer replaced the plugs with Motorcraft 4120 SVT plugs. Wrong .......finally they ordered and installed the roush approved plugs and had me pay half parts and labor.