yes i got 2 stage colder plugs and a Fuel Pressure Regulator. and a new fuel filter. heres how it happened i was racing a prelude on our local freeway and in fourth gear i armed the ZEX and at around 5500 Rpm it threw the #1 rod. i took all the info from all you guys and im still left scratchin my head on how the FU@* this could happen. something just wasnt right. oh and the bottle was 3/4 full so i know pressure was good. and as far as the nitrous mixture......not sure if was medical or the shop kind.