exhaust question

[Bamaboy]

I am new to this sight and to owning a diesel. I am trying to get some info on some exhaust modifications to my truck. I have a 2004 6.0L PSD and I would like to remove the cat and muffler with delete pipes. Will this be advantageous to the truck?

[bfrank81]

Yes big time. Before you just consider the delete pipes take a look at the complete turbo back kit. They don't cost much more and you get a larger diameter pipe that will flow better. Go with 4" from what I have read 5" is not needed unless you are building serious power.

[Ironmover]

You bet it will. You will benefit from lower egts the most. The sound is awesome and from the seat of your pants you'll feel that the truck has better response. You don't have to worry about check engine lights or any other ill side effects. The options available to you are endless which way you want to go as far as aftermarket manufacturers of piece by piece components or complete kits or you can just simply delete the cat and muffler and leave the tubing in place as a budget way to go.

[mike 6.0]

Agree with the above wasted money on muffler and cat removal only to go 4 inch tubo back. Do it right the first time......

[smokersteve]

I have the delete pipes and it made a huge difference. I do not regret buying them

[Bamaboy]

Thanks for the info. I think I will go ahead and do the delete pipes just to make sure the sound is not too loud before I spend the money for a complete system and then find out that I don't like it. I will be pulling a 5th wheel trailer and I don't want the truck to be too loud inside.

[smokersteve]

I got an exhaust tip from kregan oreilly for $35, has one outer crome wall and one inner perferated wall with packing. That surprisingly decreased the SSSSHHHHHH and some of the whistel sound.

[jagular7]

I just installed a MBRP down and test pipe. I had to go with their down as their test pipe is designed to mate to it.

Downpipes will all be similar in size 3.5". The 1" gain won't come till after that. I have a c&c and the cost is much greater than the pickup so I didn't do the whole exhaust. Still running the stock condo muffler.

I did have to cut my stock downpipe as it wouldn't come out. I also had to fold the floor/firewall lip to make clearance for the downpipe. Otherwise, pretty simple install.

Edit: additional pics

[Galaxie]

The best thing that will happen is lower EGTs. Almost tied for the best thing is the sound! The 6.0 sounds SICK opened up!