I had an airaid intake on my hhr and same thing. Sit at a light on a 90 degree day and the temps would go up to 120. A quarter mile down the road back to about 92 degrees.I'm gonna say this again, cold air intakes have almost no more benefit than an SRI in my opinion. Once you start driving, air flows into the engine bay and thus your intake will pull in ambient air temps. I can sit in traffic and watch my intake temps on my Ultragauge rise but once I start moving, they drop to ambient temps.