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JB4 Quesitions

boosted1g

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Was looking at get a JB4 and was wondering if the EWG wires will add much benefit if only using Map 1 & 2?

On that discussion I saw some info on BMS stating 93 octane with Map 2, but one of the dyno pulls saying 91 octane.
Is Map 2 safe with 91 octane if using 1 step colder plugs? There is very limited supply of 93 octane where I live.
 
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