Love the look. You've nudged me to start seeing what else I can add. After reading about the Vortex generators I ordered a set last night.

 

Good Lord!!! I swear that I was thinking of that very same mod a few nights ago. My main concern was how they'd fit the contour of the rear spoiler. How's the fit Moon?

Later
Allex

 

They fit the rear spoiler just fine. The ones I have [sixteen total], are smaller and more teardrop shape[the most aerodynamic shape that falls out of the sky everyday]. I had to sand them down and paint them black, as they were black chrome, then evenly spaced them on the spoiler.
Not sure if they keep the back window clean, as the rear shape of the HHR is'nt very aero[lots of turbulance].
Later, I'm adding a couple of[really big] air difussers under the rear bumper, and that might help some. "Moon"

 

Nice added look. I like them

 

I was fooling around one day with the reflectors and my daughters said put them there because it looks like Spider Eyes.

As for the front and rear wind deflectors it was just to give the vehicle something no one had in my area plus I didn't want to shell out for a spoiler. There are only a few on the roof because they are in line with the dimple creases in the roof line. If you think about it BATMAN the larger ones in the rear could signify the points on my BlackknighTs Gauntlet Hand Armour...

 

I'm not seeing it in this recent photo. ?



I think the air deflectors look good, I've seen some that are 3-4 inches tall, Might make some good bat ears.