Had several leaks where I had chopped off 2 of the 4 cats and always thought my exhaust sounded a bit weak so after a lot of research decided to give it a shot. 2004 f150 XLT 5.4L. true duals with an xpipe leading into two Magnaflow 11" oval bodies with 12" x 3.5" exhaust tips straight out the back. I used the 94136 cats with the o2 bung already in. No codes but will keep ya'll updated.


[IMG]Drivers Side [/IMG]
[IMG]Drivers Side [/IMG]

[IMG]Passenger Side [/IMG]
[IMG]Passenger Side [/IMG]

 

Do you notice any volume increase from the 2 hi-flow vs 2 front cat setup?

 

Yes! Definitely an increase in sound and has a lower note. Just perfect for what I want. I'll get a video tomorrow. I know you're familiar with the setup without the high flows so it would just be easier to show a video. It's like having a whole new exhaust, extremely worth while, and it puts an even bigger smile on face.

 

been thinking about doing this, i have my rear cats deleted but i think my front cats are bad since they rattle slightly

 

If you don't want to cut your front cats out, you can gut them.

 

How do you gut them out?

 

It is better to replace them or delete. Don't gut them.