You do realize that you can get 8mm wires in many other brands w/o going to the supercharged L67 Series I Bonne motor? I'd be concerned about the Bonnie's fitting properly for the back set since the plug placement in the head is not symmetrical, the charger is smaller, the coil pack bracket is different and other things.. Just tossing out a little general Bonnie knowlege for ya.
As for the gains...if your plug wires are working well, then you have no gains. If they sucked, then you'll gain back lost power.
