Which make more power a Buschur full turbo back or AMS turbo back with test pipe. I know you guys will absolutely hate this question but If I'm going to spend almost a grand I want to get the most power possible even if it's a five hp difference

 

They are equals. 5hp is a huge difference for just an exhaust - you won't find that between these two. They are both light and powerful - best in the business. I sport the BR TBE w/Bullet muffler myself.