Well I didn't get the point if there is a company out there called gready who also makes mufflers. Sparko, Sparco, Spearco. Three similar names of automotive suppliers. One makes plug wires, one makes seats (etc), and one makes intercoolers.
When you're asking about a product, generally it is best if you get the name of the product or manufacturer correct.
I have their exhaust for the GC8 and I'm damn happy with it. It's a grapefruit launcher at 4 1/2 inches on the tip, but it's not nearly as noticable as it is on other cars. I've seen it on two different body style preludes and I didn't like it on those cars. It tucks nicely up under the bumper and doesn't stick out past it either. The sound is nice and low, and not too loud. It's mean sounding when you jump on it, but not at all intrusive at cruising speeds. It's indestinguishable from stock at freeway cruising. Overall, I'm very happy with it and will probably only change it when I get a turbo and need a larger diameter exhaust. Let me know if you have any more questions.