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Old Apr 8, 2009 | 11:22 AM
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xxD3MONxx's Avatar
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Spark plugs

I just brought some autolite XP iridium plugs the number on the box is XP3934

Just wondering if these are fine for the evo and what they have to be gapped to.
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Old Apr 8, 2009 | 11:40 AM
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You don't re-gap Iridiums, because of their design.

You'll break the electrode and they should be gapped already.

I would take them back if you can, get some NGK's.

Last edited by Tnnrx7; Apr 8, 2009 at 11:49 AM.
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Old Apr 8, 2009 | 10:20 PM
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Yup what he said! Only run NGK plugs in the Evo's. Get rid of those iridium plugs I have an evo8, I run the NGK BPR8ES, Love them, and they are much much cheaper than the iridium's anyway! But really though, Run only NGK plugs!!!!!
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Old Apr 9, 2009 | 05:01 PM
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i ran iridiums before i hated them. go with ngks only
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Old Apr 9, 2009 | 07:39 PM
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Originally Posted by evil-evo
i ran iridiums before i hated them. go with ngks only
very true, plus changing plugs takes like 5-10 mins?
get NGK BPR8ES, get like 12-24 of them
Keep 4 in your toolbox
Depending on your driving, they dont really last long, but who cares they are so cheap.

For me, its a DD and track car. On regular, i change once a month
Before a major track event or race, i change the plugs
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Old Apr 9, 2009 | 07:41 PM
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+1 for NGK
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Old Apr 13, 2009 | 05:51 PM
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ngk is the best
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