i have a friend that has a 2.4l hhr and is looking to get a turbo kit for it. he was interested in the zzp kit but wants to know what out of the kit wont fit it if anything. we have already check the pcm part numbers and those are different so we think that wont work but what about the intercooler pipeing

 

you would be best off asking on the HHR forums, or e-mailing ZZP themselves for the most accurate answer.