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2014 chevy SS PBM
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Ive built quite few LS based engines, I always use ACDELOCO 41-162 thats my go to spark plug Ive also used NGK-4177 as requested by the customer. I see the OEM plug isnt 41-162 and the diffrence is platinum vs iridium. Question is who in the group is running the OEM replacement and is anyone running the 41-162? your thoughts please
 

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Ive built quite few LS based engines, I always use ACDELOCO 41-162 thats my go to spark plug Ive also used NGK-4177 as requested by the customer. I see the OEM plug isnt 41-162 and the difference is platinum vs iridium. Question is who in the group is running the OEM replacement and is anyone running the 41-162? your thoughts please
Looks to me like they are both iridium (with platinum ground pads), but have different specs on their dimensions:

291769



291768


 

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I’m pretty sure I was running the 162s for a while (stock ZR-1) I’ll double check and let you know. It was iridium.
 

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Belay my last. 104s for the ZR1
 
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