Here are both sound clips from the post you quoted. http://www.youtube.com/watch?v=K2iB9Ql-TbE http://www.youtube.com/watch?v=YHmdE6t8NGQ
No it is not. But I will have a good sound clip of one on a Toyota before too long. I have one on my truck now though. You can hear it on my truck, and the Datsun I did in this clip. http://www.youtube.com/watch?v=A861oUZ3sQY&feature=related They are designed more for compact spaces than for a specific sound. But I played with a few designs until I got a sound I liked.
I just added them to the site so they can be purchased easily. I have redesigned them since the first few I built. They have a different 3 chamber design, and I started using a different packing material that raised my cost. So they are going for $120 shipped in the US. So here they are: http://shop.twistedminis.com/product.sc?categoryId=5&productId=18
http://www.youtube.com/watch?v=F-wrBeZjtFI http://www.youtube.com/watch?v=fjlzyQuFPCM those two videos are our official benchmark of what a 22re on our truck sound like without the muffler, just cat only. then you can compare other exhausts to it! then you can compare w/e else you wanna compare lol