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Fin,
There's no HP to be had by using some expensive recyled spark plug trick. Recycled? Yes, recycled. +4's were around before WWII, hot rodders filed plugs in the 50's that look just like today's split-fires...if you really want to do the right thing spark plug wise, just use stock Delcos or NKGs and replace them every 10K-15K miles (16K-24K kilometers :) ).
Actually thermodynamics dictates that that direct face down burn spark plug design is a good, one. I used another company's same design a few years back. I compared it to my Bosh Platinums and the idle was smoother with the halo-type plug.. BUT.... On halo's distributor website they have the engine information for vettes screwed up on quite a few places. Woudl you trust a company that can't even get basic FI information right on their website with putting a specialized part INSIDE your engine?
Didn't think so..
You naughty boy - a NOS system? Where have you hidden all the stuff to fool the cops and guys at yearly vehicle inspection? :D Oh, yes you drive only on race tracks...right ;)
Make the bottle appearence look like a red GLORIA bottle, labels and all the stuff.
No problems. Otherwise just pop out the botle and brackets. No problems far. (They must be stupid or something).. :lol: