Originally Posted by BallzyS55

I didn't want to take out the primary cats, cause of the simple fact that the o2 sensors are right there, and also because that could be a major issue with smog. I took off the secondary cats, because it's very easy just to go back to any muffler shop, and have them weld them back on, also I took out the resonators for deeper, and louder sound, as for the cats off, you get better flow, I also think with them off they give you better the sound.