I decided not to mod the car at all...

 

Well depends on you tbh, they can be fun if you start modding. A simple turbo swap will make it a different car. Gmpp should hold. Or atleast that's what I will be putting on my car with my zfr but in going to do a conservative tune on my car so avoid issues

 

I won't sell my HHR but it is basically maxed out turbo wise and I am bored also. I would keep it man as the sedans are hard to come by and buy a bigger turbo and you'll be in love again.

I'd go ZFR, get new charge pipe, and retune with term if you can get a hold of him.