performance from an RNR turbo back exhaust

[kiakarimi]

i know, its a newb question but i couldn't find a forum specific enough. about how much horsepower could i expect to gain from an RNR turbo back exhaust or any other turbo back for that matter. thanks!

 

[TRBOTSI]

Does it really matter..It should be one of your first upgrades..

 

[UltraImports]

I believe the performance guide should be able to explain what kind of hp you should expect from bolt on's.