My quote was regarding fine wire center electrodes plugs promote un-shrouding of the plug that provide clean first fire at the cyl due to lean mixtures".

To keep this simple for most of the non techie readers: Multiple side electrodes (side straps in Champion terminology) only create more shrouding issues in lean conditions. Do many plug manufacturers market plugs more for marketing hype than actual performance gains that are measureable...you bet. See Split Fire Plugs, Y Fire Plugs, and a host of others.

In the DIY world, pick a plug you like that provides proper service (life, fit, fires) and enjoy. All other issues are "bench racing" that require engines, dynos, lab equipment, and skilled operators to confirm results, none of which I have access to since I left Champion Spark Plugs and Dana Corporation Engine Management Div (Accell Racing Ignition, Hurst Shifters, Borg Warner Trans /Clutches, Borg Warner, Neihoff, NAPA, Beck Arnold Ign, Mr Gasket, Fuel Management parts (Injectors, pumps, lines, rails & Tanks) etc. Welcome to conglomerates and roll ups, Dana is a $14.4 Billion company now) and moved into the IT world.

Old adage: Put 5 engineers in a room to come up with a solution to a problem and you will get back 109 solutions that you as the manager get to pick from, as each one of their 109 approaches has SWOT (Strengths, Weaknesses, Opportunities for improvements, and Threats that it will not).

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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green