Originally Posted by kugo188
I have heard that in combination, the 2 systems will result in lack of backpressure， hence, decreased performance。 is this true？ is there a solution to this potential problem？
nope you will get very good pwr. It was me who posted a decrease in pwr but It was my Primary O2 sensor giving me this problem.
GET it its good. I would keep it but I am getting a supercharger so I sold it to a forum member in HK.
PM me if you have any problems or questions I was the first in asia to get this setup.
Cheers my fellow Chinese Brother