I am about to order a di/do magnaflow for my 04, just wondering where the oxygen sensors are located so i can be sure it is ok to take the y-pipe out and go directly into the dual inlet muffler w/o messing anything up? thanks

 

they are a 2 mounted before the catalytic converter(1 on each side) before the Y. You won't even mess with them unless you change the cat. There are others also but I just mentioned the ones you're concerned about.

Hope the edit didn't throw you off. There are also cat monitor sensors mounted on the cat. but still nothing to worry about.

 

ok thanks, i thought they were...i'm working all day and just don't have time today to get under there and look and i gotta go ahead and order now. i think my 04 just has 2 though, i believe the 05's have 4 or something like that. i remember a thread about this a long time ago somewhere.

 

my truck is an early 04, one of the first new body style trucks off the assembly line, and i have 4 cats, i believe you do too.

 

maybe that's it, maybe the 04's have 4 and after that they changed it to 2, but i thought it might be the other way around.