Ordered a set for my SC VX, been reading great reviews on these with turbo and Supercharged applications... I am currently running Bosch +4 plugs they have been a nice upgrade but I want a pure performance plug and Iridium is the way to go. I was talking to Gadget about what he is running on his SC 4runner... he recommend them also, he has a very informative site check it: http://www.gadgetonline.com/4Run.htm
[I]He just sent me this email:
We stock stuff or Toyota trucks. However, I just looked up your truck in the DENSO guide and found it takes the same plug as we carry.
Stock heat range is the DENSO IK16
One step cooler is the DENSO IK20
Two steps cooler is the DENSO IK22
I would go with the IK22 if you are supercharged. That is what we use in all the Toyota supercharged trucks and they are great. You can order those off of the URD site. www.URDUSA.com
Just order a set of the Two steps cooler plugs, Will let you know how it goes. They told me that they run great in Toyota SC engines and I should be pleased with the upgrade... was also told to adjust to the stock gap, anyone know what that is? Wait just found it Spark plug gap: 0.040 in. (1.05mm)
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