i have a 2003 focus with zetec. i have a fidanza flywheel, 4-1 header, 2.25 exhaust, cai, msd ignition, SCT software tuned. and a 255 fuel pump. i have 152 wheel hp, 154 wheel tq on a mustang dyno. i just put a 100 shot nx express kit in it. it ran at 227whp on a 75 shot just fine. then we increased it to 100 shot we made 247whp on the 8 pass, increasing in increments. still on a mustang dyno. then on the 9 pass at 5100rpm at 190whp, wide open throttle, the intake manifold blew up. took the maf with it. just wondering if anyone else has tried 100 shot? it's not just thrown into the car. it's all laptop tuned live by wire. maybe i should stick to a 75 shot?