OK It's crunch time. The muffler shop will charge me $70 to cut off all 4 converters, and replace them with pipe. Should I do it?

Please reply if you have done this before, and/or have had experience with this.

 

By the way...

99 5.4L 4x4 w/ Magnaflow dual exhaust.

 

I have had two mustangs with "off road" H-pipes and will tell you that is some kind of pain in the rear come inspection time. I could even change back to the stock H-pipe for the emission testing. I don't know about the F150 but the mustang required MIL eliminatiors in between the O2 and the CPU to keep from going into limp mode thinking the excess fuel was off the charts. I do not think I will have a car or truck where I have to go through that any more. The "seat of the pants" gains were not enough to justify removal.

runngt

 

Not to mention it is a felony to remove them, and they really don't hurt anything. It is surprising a shop will do it, they get in very serious trouble if they get caught. Stock cats actually flow pretty good, I wouldn't mess with them.

 

I wouldn't.. just cause of inspection & all, save up for high flow cats.

 

id leave them on. plenty of other ways to gain power. headers and high flow cats for example.

 

I have an 02 f150 and I was wondering if taking off 2 of the cats would be worth it and which ones. front or back

 

Why? A couple of hp if anything, plus issues with smog testing and felony if caught?

I suggest leaving it alone or replacing with aftermarket high-flow cats, but gutting or removing is a bad idea.

 

the ones way up front. Those are the 'pre-cats' a.k.a resonators, the longer ones behind it are the real cats, so the fronts are just killing your sound. So remove those

 

thanx I will probably get those taken care of in the next few weeks. although I have flowmasters so will I still have the low rumble but just louder...which is what I want

 

I took of the cat on my camaro when I had it and it made it alot louder but I don't know if it gave me the deep sounds I wanted. I wouldn't do it again if I had the chance but I will be replacing all 4 cats in my f150 with 2 hi flows very soon.