Denso Iridium's (Where and $)
 

A while back I ask what plugs every one was running with a 4# pulley. Since then, I have changed jobs and computers and cannot get to the information. I already have a 2# upper and am going to add a 2# lower and do not want to melt spark plugs(obviously). Do I need to immediately change plugs, or can I wait a couple thousand miles, and when I do, it seems everyone likes the Iridiums. Where did you get them and how much should I expect to pay? Any help, advice would be greatly appreciated.

http://www.johnnylightningperf.com

I would recommend replacing them with the pulley.

Every truck is different. Some guys blow their motors after a few hundred miles and some like me had no probs and i drove mine for about 1000miles. I bought mine for $90 or $95 from Johnny Lightning. He has an easy web site to look through.
its www.johnnylightningperf.com hope this helps

Sal also has them www.powersurgeperformance.net.

if anyone on here is in the indiana area,i can get the denso's for 75. i paid 90 for them before i found out one of our distributors at work carry them. oh well,as far is i'm concerned they are worth 100.