Exhaust

[Vitucc]

Good Afternoon Members,

I have a 04 F-350 dually and i woulf like to do some exhaust work. My buddy has the same truck and removed the cat and muffler and ran a straight pipe. Sounds nice but has anyone done this on the board. How bad does it affect MPG , is it good or bad for the motor / turbo, will this thing still pass an emission test? I was thinking of just removing the muffler and keeping the cat. Suggestions needed .

Thanks,

[Gear Jammer]

I got stacks on my truck with no muffler or cat. Have about 40,000 mile son it since then. Never had a problem. I live in PA sont dont have to worry about emission BS.

[colberjs]

I did the same thing and haven't had any problems. I haven't noticed a lot of change in MPG's, maybe a little improvement. But I did it right after I got it and my driving habits aren't exactly textbook if you know what I mean.

[Raul@Stealth Automotive]

i run mine straight piped.. but it will not pass an emisions visual inspection without the cat...

my suggestion is going with a MBRP kit that retains the cat and purchasing the cat test pipe to make it a straight pipe.... then when you need to do emissions just simply bolt on the cat and muffler back on

let me know if you have any questions or need prices

-Raul

[dhanna6powerstroke]

Originally Posted by Vitucc

Good Afternoon Members,

I have a 04 F-350 dually and i woulf like to do some exhaust work. My buddy has the same truck and removed the cat and muffler and ran a straight pipe. Sounds nice but has anyone done this on the board. How bad does it affect MPG , is it good or bad for the motor / turbo, will this thing still pass an emission test? I was thinking of just removing the muffler and keeping the cat. Suggestions needed .

Thanks,

Mine is straight piped, no cat or muffler. My mileage has suffered but thats just because I can't keep my foot out of it. I like hearing the 03 turbo too much.

[helsel_182]

i just disconnected right infront of the cat and put a turndown so there is only like 4-5 feet of pipe i have been driving like that for 30+ thousand miles and no problems sounds reallt loud and very low egt nice whistle to

[Vitucc]

Originally Posted by helsel_182

i just disconnected right infront of the cat and put a turndown so there is only like 4-5 feet of pipe i have been driving like that for 30+ thousand miles and no problems sounds reallt loud and very low egt nice whistle to

This is awsome news. I am going to staright pipe my truck since it wont hurt MPG's and the engine.