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Discussion Starter · #1 ·
my custumer brought me some NGK R5724-8 and I was wondering what gap we should use on this truck. Somebody recommended him to run 28*.

its a build motor, will have ported blower, has long tube headers with high flow cats and upgraded fuel pumps.will probably be pushing 550-600 when on.
what gap should we use?
 

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Personally I would tell him to run br7ef gapped the way they come out of the box. Approx .026" or so. I ran the ngk tr7ix gapped at .029" and they were great plugs. I changed to the br7ef to have better heat transfer with a non-projected plug. Tradeoff is more often plug changes
 
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