Today is a sunny day (typhoon just passed yesterday) and I finally got chance to test Werks pipe (with my Picco .12 XP 5ports).
Compare with mod AE pipe (manifold -11mm), the Werks pipe has similar topend (top speed about the same, maybe a very little bit faster). However, the bottom is much smooth and liner than my mod AE pipe. The car is now less punch and probably the reaction speed is a bit slower, but I like the smooth bottom rather than hard to control rocket. I don't consider the bottom is "weak", but "more liner".
Best part: I got ZERO flameout today (25% fuel), which is impossible with AE pipe, mod or stock. And engine performance is very consistence. I did no re-tune on engine in 4hrs testing, which also impossible with AE pipe, mod or stock.
Overall, I think the pipe probably will has a better performance on more powerful engine (Picco .12 XP 5ports is very stock, compare with those JP/Max/Mega monster). And I will stick with it since I had enough with unpredictable AE pipe (and hell, it looks GOOD ).