yeah, i now have a full exhaust with the precats in tact. WOW!!! LOUD LOUD LOUD!! i cant drive with the thing its so damn loud. i honestly have never heard a louder exhaust. it sounds really good now. i have dnp frontpipe, testpipe, and straight pipes no mufflers. the car screams in more ways than one. it pulls really hard up top, and its REALLY loud. i would not advise doing this unless you want to wear earplugs when you drive. im picking up my set of ear plugs on the way home tonight from work.