I thought I'd let you guys know what I experienced.
My 2008 GSA has always stumbled when I accelerated from a stop or from a low speed.
A month or so ago I installed the IICE Air. I noticed the hesitation has gone away. It's pretty subtle, but I'm happy with the results. I can now gun it and not have that hesitation.
08 1200 GSA Magnesium Metallic