i'm saving up to get new exhaust and it's going to be from the headers to the tips then which i will get a Custom mail order tune but for now i'm useing the Flashpaq tuner which i need to update online soon.....Truck is a 2001 Sierra C3 LQ4 (6.0L) with K&N CAI...i won't have any track days till im back in the states so now i want all the power i can get just o suprise some germans who think highly of their bmw's and audi's when a 5200 Lbs truck can keep up.....As fasr as shift firmness and shift points does anyone have experience on the flashpaq to get the most out of it??