How do the Hyperflow Cats compare vs. the tubis?

AFAIK they are two different items - tubis are catback exhausts and the hyperflow cats are in the exhaust flow before the exhausts.

 

Go HyperFlow!!!!!!!!!!!!!

 

Test pipes run about 1/3 the cost of that of Hyper Flow. Test pipes are louder. Hyper Flows accomplish nearly the same effect as test pipes but you don't have the noxious fuel smell associated w/ HF. HF or test pipes improve dramatically the sound and tone of the exhaust over the stock cats/exhaust.
Go Hyper Flow but install a nice upgrade exhaust w/ it, if you haven't. Perhaps an O-XST, TUBI, MS RACING or Larini.

Good Luck,

 

Don't forget Capristo.