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Discussion Starter · #1 ·
Whats the best plugs for a 98 4.3? Any between low end AC and their premium lines?
 

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Ac delco Platinum plugs.
 

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I always use what A/C Delco plug came in the truck.
 

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Discussion Starter · #4 ·
Does Delco make an Irridium?
 

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Yes. however not called for in your motor. and there isnt a performance gain from using them.
 

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Discussion Starter · #6 ·
Thanks Just trying to squeeze ALL the mileage I can outta her! LOL
 
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