I have HPTuners. I just need to play around with it. I haven't tried with the HHR yet. Would be cool to talk to people that have good files written though!

 

I haven't experienced any wheel hop yet

 

have you really launched it hard? Heck i had broken my factory Trans. mounts

 

As hard as the stock configuration would allow it. The tires squealed a little , but I got no hop

Doesn't mean I'm not interested though. I'm sure if i experience it, I will be buying these. Mainly the HHR was for when my wife and i start a family. I just hate not having something w/o power. I have my I5 Colorado pretty much maxed out, and loved it.

 

did you see my SSA thread mine is going under the knife for a new manifold and a Precision 6262 Billet Turbo.....with all the other mods installed. SSA fixes the rest and BUILDS the BEST

 

pretty much anything suspension wise cobalt>hhr is interchangable.
i think the xhaust is a tad shorter on the hhr's .

 

it's either shorter or longer....... i can't remember for the life of me.