Pricey to get here, but I've heard nothing but good things about it. Someone did some comparitive testing awhile back on NAM and it was the best of the aftermarket air to air IC's at the time...
There was a test done by a fellow on NAM. The result was the GRS had a bigger temp delta in vs. out than any other aftermarket IC available.
From my experience having one, its aerodynamics aren't as good as the GP intercooler, resulting in better cooling for the first 10 minutes on a racetrack but then it'll heatsoak more than the GP or stock. Bottom line; the GRS is good for auto-x or street.
