Okay guys, i was looking around and couldn't really find my answer. So heres the problem, I have the stock exhaust on the 2.7l. I cut the exhaust off over the axle, shortly after that my truck begin to act sluggish. Is that from me cutting the exhaust? Or is it more likely being a stopped up cat? I have 2 cats, and if it is bad Which cats should i go with? I also want to run a header? DT or LCE? and Im stuck between the Magnaflow or Aero Turbine, Which setup would benefit more torque?