The PLOG off your old car will work...or you can just take it and the sway bars (if they are still good AND the DP) and sell them off for Speed Daddy headers...which are about $200 now...and are a GREAT breathing mod for these cars. Being GenV powered headers will help you tons...(and will allow for a drop to a 3.6" pulley, which is the eqivalant to the 3.4" setup on the 97-03 cars)...since the GenV is way more efficient than any ported GenIII blower.

If your wanting to keep it cheap...the PLOG and DP BOTH will work on an '06 car.