will all test pipes fit any year Z from 2003-2008?
what will i get out of these if i dont have an aftermarket exhaust yet?

 

no, only de test pipes will fit 03-06, and hr tp will fit 07-08. And you will get a nice, deeper growl out of the test pipes, assuming you have the stock exhaust.

 

You will get exhaust out of test pipes regardless of what you have AFTER the pipes.

 

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you won't get as much of a HP gain without an aftermarket exhaust, but some do prefer the stock sleeper look and just add TP's for a nice growling sound

 

nice vids... thanks for the input all