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Reviews (2)
05 February 2020
Highest of Quality, Smoothest of Operation
Everything you would ever need in a reel, period.
22 January 2021
Went in a little skeptical...
3 of 3 found this helpful Very noticeable difference over NGK Iridium. Better throttle response and acceleration, better cold cranking power and astounding passing power. This plug also has the best spark advance (I own dealer-quality diagnostic tools) I have ever seen without some sort of tune or other modification, and doesn’t get very hot like Iridium/Platinum does. Over a course of 2 weeks (2 full gas tanks), have gained 0.6 MPG. Have difficulty keeping under the speed limit and maintaining common speeds oftentimes, with no intention of going faster. Will definitely try them out again on other vehicles to see if I get the same result. Note that these plugs do have a copper core, so expect to replace them every 30,000 miles or yearly.
Note: I do have Becker ignition coils installed, so performance coils may (or may not) have complimented this spark plug.