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spark plugs

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Looking to buy new spark plugs and wires...was looking into NGK BPR6ES...but there are so many different NGK BPR6ES to choose from like resistor and non-resistor etc....what exactly am I looking for and what should I buy?

Bpr6es is a resistor plug. That part number is for one plug. Where are you getting your information about there being many different ones?
 
You think I can go to a local part store like Autozone or O'reily and tell them the part # and get the exact part? I used to just go there and told them my year make and model and they asked me what kind i want so I told them the best kind and they gave me NGK. Think Ill just go with the 7.
 
The 6ES will cover about 1/3 of DSM owners. I would only upgrade to the 7ES if I start to notice stumbling in the RPM band. FWIW, I used 6ES at 19 psi on a small 16g. I used 7ES on a E3 16g at 27 psi. And I am not using 8ES on my Holset HX40...haven't boost it yet.
 
Iridium last's longer, but is no gain in performance whatsoever. You will be more likely to have ignition problems with the iridium than the copper.
 
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