Has anyone personally used these things? Denso makes them for like $8? each. I was going to change the plugs on my girlfriend's mom's Lexus RX300 and when I pulled the 1st plug noticed they were Denso Iridiums & looked like new at 75K. I'm currnetly using NGK V grooves for about $2each and change them about every 15K. My brother is thinking about putting a set in his LS1 Trans am. changing plugs in that car SUCKS. So, anyone know anything about them?


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