how easy would it b/legal to remove the front 2 cats?

 

do what i did, it is much easier to remove the rear cats b/c its a straight piece of pipe to replace it with instead of a bent pipe. theyre both illegal.

 

shoot. i just wanna b able 2 pass inspection how would i go about doin that

 

well if you take all the cats out and put in 2 high flow cats, it will be better then stock. i think thats legal..but im not for sure.

 

mine passes inspection bc the check engine light has stayed off

 

Yea, your forwards alone should pass the sniff. Might as well call them high flows once the rears are removed lol.

Your still within programmed parameters without the rears, so no CEL, -IF your connections are tight.

If you live in California, -you better not touch them, - don't even look at them, just forget they're there lol.

 

im in MD so they just check 2 see if the exaust is all there in the back. never checking the front. i suppose i will cut the back ones out and weld in pipe are there any O2 senosers 2 deal with in this operation?

 

Remove the rear one instead.

 

thats what i will do

 

Hi Im a new member to the forum but ive been a member of the Expedition forum for about a year now and yes we stole the Gotts Mod from you guys lol. I was just wondering my truck is a 2002 5.4 liter with the 4 cats with two oxygen sensors before the pre cats and two BEHIND the main cats. I want to remove the rear cats but I am wondering if this will throw codes, some of the members say it will and some say it wont, so what are your guys opinions on this.

 

You are reading mixed reviews on this because it is a 50/50 shot of throwing a code. Search "o2 gotts mod" and see how easy it is to work around the code.

 

thank you frog, yes i read about the Gotts 02 mod and im going to be picking up some non foulers just in case i need them, hope i wont though seeing as another member on the expy forum called "racenut" has the same year as me and he did not throw a code. I have true daul with flowmaster 40 series, can I expect a big difference on the sound after the cat delete? Btw you guys all got some bad *** looking trucks

 

^ You will be very pleased!

 

My front cats are hollow, but stock housings still remain.....

 

^ ok im pretty well mechanically skilled but I dont understand how do u hollow out the cats? U need to remove them and im guessing stab them through with screwdrivers or a pipe? Why not just remove them fully? Btw I picked up some non foulers today just incase I need them