i personally havent heard anything about those.
i run KYB AGX ajustables and they are great. And my car is a 100% DD.
Only reason i ask is because they state to have a limited lifetime warranty. I was curious what the limited standards are. Im sure its not hard but i still dont see why I would need to pay 117 dollars per strut.im not sure about the warranty, but i only ajust mine from street to strip. not that hard, turn of a dial
I dont know about the warranty but im sure its just like most, bullshit. I would not rely on it but I have had mine on for about 30k now with no problems what so ever. And you already know this but you get what you pay for. Bilstein also makes good shocks and struts and you can get the package for a little cheaper. Bilstein Shocks & Struts at AmericanMuscle.com - Free Shipping!
I had the gas on my 91 coupe and i liked them. Between those two thats what I would go with. The GR's seem like more of just a replacement shock.