Thunderbolt Catalytic Converter?

I've been looking for a 3" cat for my exhaust setup. High flow would be beneficial I guess, but a not a huge concern. I'm only running a glasspack right now and want to get rid of the burble-y cackle that the exhaust can have at times.

I saw that Summit has some Catcos around $60 and even Magnaflows around $75. Either would be fine for me, I think. However, I then saw a catalytic converter made by Thunderbolt (at least that's what its labeled as) going for $45 or so. Says high flow.

Any one run this cheap Thunderbolt cat? It says they are a spun and "high quality". Again, I don't care if its not the highest flow, but I do want it to last.

http://cgi.ebay.com/ebaymotors/3-Catalyt...1895wt_957

Here's what I'm talking about.

napa..walker converter
15034...w/air tube 93.00 small round
15039...no air tube 89.00 small round

napa..walker ultra converter [hi-po]
93239...131.00 small round
92304...158.00 oval

all aval. for local napa store...special order 1 to 2 days away

u can also do what the import guys do...put a glass pack in the middle of the car and ur favorite muffin in the oe spot...it usuall takes out the tin can fart popper sound.....