Megan dp w/ custom exhaust

[DSM-Talon-John]

This weekend im installing a 3in turbo back exhaust with nothing but pipe. Can someone tell me your opinions on it. Also what kind of gains am i looking at by deleting the cat and opening it up like that with no restrictions at all. Will it really be that much with a t-25, will my t-25 hold boost better?

 

[dnhieu]

my butt dyno says that this released the most hp out of all the mods i have done. you might have some boost creep issues now...

 

[DSM-Talon-John]

What did you do? How much hp gains did you have