I installed a chip from Superchips. It took that "weak-spot" away from the car. You know, the dead area below 2,000 rpm. It gives a minimal hp increase, but it does increase torque about 10lb to 12lb.(they say) The difference IS noticable. Now everytime you come down to 2,000 rpm, you do not have to down-shift. The install took about 20 to 30 minutes. The hardest part of the job was removing the coating on the circuit board so the new chip makes contact.
It's worth the money.