When trying to decide which way you should go .... think about the criticality of the part you are shopping for. What kind of abuse does this part see, how often is this part used, is it a key ingredient in the recipe for engine health and performance, is changing to an untested alternative worth the risk?
The Brisk ER10S is $11x5 = $55
The NGK 7437-9 is $40x5 = $200
The difference is about $150 over the course of a year (I change mine every spring). My time alone is worth more than that to NOT have to change the plugs as often!
Unitronic has the NGK plugs in stock which you know are authentic NGK. I'm not a UNI nuthugger but they do have one of the best shipping and supply chains out there. I just received my spring resupply which arrived 3 days after placing the order.
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