These guys put a tsp downpipe and prl front pipe with the stock exhaust. It sounds very good to me and I will probably do the same.
Sound clip is towards the end. Did you notice a sound difference with just the 27won front pipe?
I have TSP stage 1 tune. I daily on map 2 with 18 psi max, stock is about 15-16psi. From what I understand its boost by gear, meaning you wont hit max boost until your in 3rd or 4th gear. Its a great tune, I've had for about 4k miles without any issues.