Hey guys I've currently got the Magnaflow Dual exit cat-back on my 04 4.0 Ranger. I've been thinking about cutting the 3rd cat out, I'm pretty happy with the way it sounds but I want to get a little bit more of an agressive sound out of the truck. I deffinately don't want to loose any torque from this or make the truck sound obnoxius. My 97 thunderbird 4.6 has true dual exhaust with a dual in dual out magnaflow with no cats (rear 02's shut off). I'm not sure if I lost any torque by lossing the cats on that car because I went from 3.27 to 3.73 gears at the same time. So whats you guys's input on lossing the 3rd cat? Thanks.

 

Cats are there for a reason. Leave it on, it is a federal offense i believe to remove them. If you want a more aggressive sound try another muffler. Mabe a flowmaster 40?? just my .02

 

We don't have any kinds of emissions testing/checking up here so I'm not too worried about it. The flowmaster sound isnt really what I'm going for I just want a little deeper sound. To each their own but to me, flowmasters sound like a tin can full of nails.

 

do it. i did, i def didn't lose anything and it did get a little louder. it shouldn't be obnoxious if you still have a muffler. i know a bunch of people are gonna say not to because of the environment, and the legality , but i wouldn't let that bother you too much.

 

What kind of muffler are you running elementsenjoi ?

 

i made it true duals with flowtech glasspacks. you probably wouldn't like the sound of it. i'm not sure that i do.

 

the last two are there to preheat the front two cats on a 4.0

i pulled the whole thing out and installed 2 magnaflow cats. mine is pretty deep at idle and putting around in the parking lot. open it up and it gets a little raspy.

 

find a Y-pipe off a newer truck, then you only have 2 cats....

 

My 2006 has 3 cats...

 

my 99's got 2 but w/e


it is a federal offense to remove them but then it also comes down to laws like in Laramie, you have to have a muffler but no cats... weird stuff.


just dont go to the EPA bragging that you took it off

 

Yeah I haven't had any on my Thunderbird for about 4 years and no problems or anything. Obviously if I moved to somewhere where they tested for that I'd change that. My main concern was what kind of changed this would make in sound, and I don't want to lose any torque.

 

Zach..how much were your magnaflow cats? Did they help much?

 

Did any of guys expierence any torque loss? Thats my main concern in doing this mod. Im mostly doing it for the sound, anybody have no 3rd cat with magnaflow exhaust?

 

Ah not sure I got them for free. LOL anyway i think they are 90 each. stainless steel and mirror polish.

the sound is not what i ever thought it would be, very beefy putting around and at idle. But it really opens up when i hammer down.


I noticed no TQ loss(from the butt dyno) with my changes.