Pajeroman, I don't want to rain on your parade, but the 7hp "improvment" you got on the dyno is within the basic "identical repeat" error range for a chassis dyno. Were the following factors IDENTICAL: tire pressure, engine temp, tranny temp, diff temp, t/case temp, air temp, relative humidity, barometric pressure, fuel batch, ignition wires, ignition timing, dirtiness of the injectors, crud in the throttle body, pressure diff across the air filter, a/c line voltage, and about 100 more variables. If not (and I guarantee they weren't!), you can't attribute the gain to the plugs - unless you had an intermittent misfire with the old ones and not with the new ones, if it sparks and fires, that's it.

I'm an NGK fan, too, both plugs and wires. Magnecor wires are better than NGK's, but all the rest I've seen run at best a distant 3rd place, and I'm talking about plain vanilla NGK resistor plugs. the only thing I might do is to narrow the plug gap a little to create a slightly higher probability of the spark jumping the gap, especially in the turbo at higher boosts, where I might drop the gap to .030 -.035" depending on boost level, where the turbo turbulence can blow out the spark at higher rpms