I was looking around tonight trying to find the best price on a set NGK TR7IX's and found two good sites. The first being Summit, and the second being sparkplugs.com. Summit comes in at $7.99 and sparkplugs.com at $7.60. Not bad considering My local Napa sells them for $9.33.

I know when you add it all up it doesn't amount to much, but you could look at it this way, your savings will buy you another gallon of race gas...