I had problems w/ what I "thought" at first was overheating due to the "shitty" stock cooling system. Well, $500+ later the problem became clear. I was pushing coolant under boost and eventually enough was being pushed out to make the car heat up too much (start to overheat). Well, like you're thinking, yes it was the HG leaking. But I'll tell you what, I wouldn't trade my Fluidyne for anything. It has made a night and day differance w/ temps. On a cool day w/ the 180 deg therm I've never seen her get over 184-7. On a hot day...between 187-194!! I love it and recommend one to anyone.
Installation was EASY. Print the directions on RRE's site and go to town. Took me about 2 hours (not including where I had to cut the bumper).
Also, don't let yourself be fooled. Our stock cooling system is SHITTY. It is ALWAYS a good idea to upgrade it. Especially if you race alot (street, drag, or auto-x). Cooling systems (one of the MOST!!! important systems) are often overlooked and when they fail it can be disasterous for the motor. Just my .02. Later.