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What p/n denso iridum plugs 4-08 -4.0

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Old 12-22-2009, 06:50 AM   #1
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What p/n denso iridum plugs 4-08 -4.0

Going 2 try iridum plugs in my 08 4.0 cant see changing plugs every 30 thou miles what part # on the plugs 2 use
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Old 12-22-2009, 10:54 AM   #3
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Yea, I think the 4.0 runs better on standard plugs or Toyota would have put iridiums in the engine like they did the 2.7.
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Old 12-22-2009, 11:00 AM   #4
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Not sure about the part where it runs better/worse, but I know people have been breaking them when they come out. Kinda scares me now because I installed them awhile ago on my truck..... sorry I forget the P/N though. You can find them online though, I wanna say it had a K20 in the P/N.
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Old 12-22-2009, 11:03 AM   #6
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Quote:
Originally Posted by NAAC3TACO View Post
Yea, I think the 4.0 runs better on standard plugs or Toyota would have put iridiums in the engine like they did the 2.7.

Correct. The 1GR-FE seems to run best with the OEM Nickle/Copper plugs.

OP. Changing the plugs is an easy DIY, and being its a good idea to check your plugs every 30K anyway, to monitor how the engine is running, I reecomend just using the OEM plugs, and changing at 30K.
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