I am new to the mark VIII and to LVC. My car is pritty mutch bone stock only mod is a K&N filter charger for a mustang that I installed in place of the original air box. Looking for a little more power, need to keep up with my wifes 07 SS Impala. Have been thinking about getting a programer to get a little more out of the PCM. Was wondering what are the good ones? What are the bad? Also open to any other ideas for some quick HP gains.