Take the guess work out of upgrading your 2005-06 GTO with the Power Kit from JEGS. Each package is comprised of a group of the best performance parts offered at JEGS, all of which work together to significantly improve performance without adversely affecting drivability. Each kit includes the K&N 63 series cold air induction kit, MSD multiple spark ignition coils, Superchips Flash Paq tuner, SLP underdrive crank pulley and an SLP 160 degree thermostat.