[robert2183]

I'm no expert - but as far as I know the 2003 Stage 1 should be the only one that comes with the injectors and the PCM. Below are the horsepower ratings for the different years (along with explanations). Please correct me if I'm wrong.

2003 PT Cruiser GT @ 215hp ("S0 Injectors", need S1 Injectors w/ PCM)
2004 PT Cruiser GT @ 220hp ('S1 Injectors' introduced = 5hp gain)
2005 PT Cruiser GT @ 220hp ('S1 Injectors' with aluminum manifold)
2005 PT Cruiser GT @ 230hp ('S1 Inejctors' with PLASTIC manifold ~ +10hp)
2006 PT Cruiser GT @ 230hp (All 06/07 GTs come with plastic manifold)

But aside from all that -- You must get a Stage 1 PCM specifically for an 06 (and I think all GTs come with ABS). Hard/Impossible to find used for our 'newer' PTs (I have an 06 GT Autostick Convertible). Also -- using anything that is designed for the SRT-4... usually doesn't work for the PT GT. Same engine, but there are some physical interface differences.

Best of luck

~Robert