I have a 99 chevy Z71 silverado with hypertech programmer and k&n cold air intake what else can i do for more power

 

exhaust

 

Im telling you from experience, ditch the Hypertech and get a Predator. Once you reduce (not remove) the TQM on the truck it really wakes up! Just lightly touch the pedal and you take off. Saves gas too by not having to floor it to merge into traffic or pull hills.