VIDEO: Best Spark Plug Design? Let's find out! E3, Pulstar, Racing & Platinum

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E3, Pulstar, Autolite Racing, NGK Iridium, and NGK Copper spark plugs tested for fuel efficiency performance and visually observed for burn characteristics. I could use your help. If you'd like to help me decide on which products to test, please consider subscribing to the channel (it's free). I occasionally ask viewers to vote on products to test and YouTube only includes those subscribed to the channel in the opportunity to vote. 

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