hey guys new to the forum here,i had a couple of questions.i have been considering pulling my pre heater/cat section out and replacing it with a high flow cat.have any of you guys done this?i would assume it would raise my powerband somewhat,i dont know if its worth doing or not,but i am a bit concerned about the high millage on my cat right now,and it beeing to much of a restriction.i'm running a 92' 4.0 in my 89 truck,mild cam,headers and flowmaster exhaust.also,did you expeirience any big exhaust sound volume changes switching over?thanks very much.
2nd,how does one search the forum databases?i'm sure this has all been discused before,but i could not locate a search feature for all the forums.thanks again!