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Originally Posted by SupraTitan
Looked it up the stock plugs are the NGK double platinum. They retail for over $11 a piece!, the iridium ngk plug for the titan retails at just over $7. Definatly not worth swapping, espcially from a performance stand point. Usaully you will find the best performance with a fresh set of $1 copper plugs, at least thats what i've always found worked the best in my supra which calls for a plat. plug. Just require yearly changes.
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another interesting thing about coppers...champion for example extend slightly further into the cylinder and gain a little timing because they start the flame slightly quicker and it burns slightly quicker. juma