[AZKen]

Commentary, not aimed at anyone:

It really does not matter brand wise. The right threads, the right protrusion into the combustion chamber and gap is all that matters. Plugs are not high tech. They just make a spark. The only moving part is the hype. Condition of motor, rings, timing, rich, lean, manifold heat leaks are what fouls a plug. As some folks have found, going "Hot" is not advantagous and can cause trouble.

Don't fall for sales words like "Hot Spark", "Flamethrower" "performance plugs" "Split Fire"..................We have VERY LOW RPM "Non performance", reliable, high torque, super engineered motors that run on any properly gapped spark. Just make sure you have good plug wires.