Thanks to @KLR STINGER for this information: Any misfires from these piggybacks are 100% due to spark blow out on the transient increase in cylinder pressure during the onset of boost. The 3.3T pistons seem to have a high compression height with small quench area. This could be exacerbating the blow out issue. No matter what the piggyback maker says, you need to use the best quality plug you can with it gapped down to .022-4. This should resolve the misfire conditions that most seem to be having.