i have a 99 Z71 5.3 with a granatelli mas air sensor...K&N intake..tornado..airaid tbspacer...msd wires...bosch plat 4 plugs...granatelli predator tune with firmer shifts and shift points at 1-2 40 at 5800 and 2-3 at 80 at5700 and 3-4 at 5700...flowmaster 50 series exhaust with turndowns.. my truck will chirp 2nd so it does have some nut, i was just wondering what my approximate HP would be if anyone could give me and idea i still need to take it to the track and to the dyno but i was just wonderin if anyone could predicet what id have..