What should i expect from......
 

Installing a Z06 ti exhaust on my stock c5 coupe? Are the gains comparable to that of a Corsa, B&B, Borla or Granetelli set up? I know the exhaust note changes slightly and the weight savings, but would it be worth it to save a few more bucks and grab one of the other systems used? Anyone have any ti dyno posts?

Ti is up there with best flowing & gains for any aftermarket exhaust. You may see 2 +/- from another catback but the price per HP isnt worth it.

Tony.

basically guys that switch out the stock ti for an aftermarket exhaust due it for sound. You may see with an aftermarket, maybe 5rwhp. The stock ti sounds tons better than the stock C5 catback. The stock ti with longtubes and no cats sounds great!
you wil be amazed as to how light the ti is. I couldn't believe it.

You won't see much power at the ground (maybe 1-2HP) but they're certainly lighter than stock by about 50%.

IMO, axle back mods are the biggest waste of money unless you're trying to change the sound of the car. Z06 Ti's sound the best to me, but as for gains, you'd be better off spending the money on headers or high flow cats. Even an x-pipe would be a better investment IMO.