I got mine on gbc, couldn't be happier with the quality. The gc normal spring rates are softer than H&R's and skunk2's->(by far), so if you looking for an H&R type stiffness, then you'll have to get a custom spring rate, just call the dealre and talk to them about getting custom spring rates. The only reason I mentioned this is cuz, I wish I had a gotten a little stiffer spring rate. I even have kyb agx's on the stiffest setting and I scrape too much, but then again you might not be going as low as I am. Thought I'd atleast mention that.