How much HP will Turbo XS Test Pipes get me?
 

What's up everyone! This is my first post. I've got a '12 6MT Sport Touring that I love. I'm about to install my TurboXS test pipes this weekend and I've got a few questions:

(1) Of you who've installed these, why'd you choose them over... say berks?
(2) What kind of power gains have you experienced?
(3) What kind of issues you've experienced when installing?
(4) What exhaust systems have you paired these up with?

Any and all input is much appreciated for this forum noob!

Thanks everyone!