DPF Back Exhaust - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 21 (permalink) Old 02-04-2009, 07:24 PM Thread Starter
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DPF Back Exhaust

I was wondering if anyone has a dpf back after market exhaust system on their truck? I have MBRP Cool Duals on mine and was wondering if anyone was running the same ones with the dpf still on their truck. I have to take my truck back to the dealer and I am hoping that I can just keep the cool duals on with the dpf when I take it in. Wasn't sure if they would say that will void the warrant even thought the dpf is still on. The system is designed to work with the dpf.
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post #2 of 21 (permalink) Old 02-04-2009, 07:31 PM
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Shouldnt be a problem. All the emissions BS is still on the truck.

Lets just say not quite stock.
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post #3 of 21 (permalink) Old 02-04-2009, 07:34 PM
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You'll be fine. You could just give um to me.

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post #4 of 21 (permalink) Old 02-04-2009, 08:10 PM Thread Starter
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I hope so. I was reading the owners manuel and damn, if you look at the truck wrong you'll void something according to Ford. It sucks that you spend all this money on a truck and you can't even change the tail pipe or intake without having to worry about voiding a warranty.
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post #5 of 21 (permalink) Old 02-04-2009, 10:05 PM
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Quote:
Originally Posted by bcjag72 View Post
I was wondering if anyone has a dpf back after market exhaust system on their truck? I have MBRP Cool Duals on mine and was wondering if anyone was running the same ones with the dpf still on their truck. I have to take my truck back to the dealer and I am hoping that I can just keep the cool duals on with the dpf when I take it in. Wasn't sure if they would say that will void the warrant even thought the dpf is still on. The system is designed to work with the dpf.


Did these come with a muffler or does it just eliminate it? How does it sound? These 6.4's are just tooo quiet for me.
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post #6 of 21 (permalink) Old 02-04-2009, 11:43 PM
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I talked to a guy from banks and asked him the question about the muffler and his reply was, the DPf acted as a muffler which inturn when adding the DPf exhaust you didn't need a muffler. I ordered one and planning on not even using any muffler after the DPf. I wish I could just get rid of everything under there and be done with it. Join you Spartan guys....

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post #7 of 21 (permalink) Old 02-04-2009, 11:57 PM
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[QUOTE=bcjag72;675589]I hope so. I was reading the owners manuel and damn, if you look at the truck wrong you'll void something according to Ford. It sucks that you spend all this money on a truck and you can't even change the tail pipe or intake without having to worry about voiding a warranty.[/QUOTE

I personally believe that later on when the 6.7's come out that ford will loosen up a little on the voiding warranty stuff. But i could be wrong sense emissions stuff will get worse in a couple of years.

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post #8 of 21 (permalink) Old 02-05-2009, 12:27 AM
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I talked to a guy from banks and asked him the question about the muffler and his reply was, the DPf acted as a muffler which inturn when adding the DPf exhaust you didn't need a muffler. I ordered one and planning on not even using any muffler after the DPf. I wish I could just get rid of everything under there and be done with it. Join you Spartan guys....
Actually with 2 turbos, I doubt the use of a muffler is all that effective (besides building backpressure). 2 turbos on an engine will quiet it significantly as it is. My 80mm turbo mustang (1000hp) with a straight pipe on it sounds relatively similar to my heads,cam, intake motor (350 hp) with true dual flowmasters. I just want something throatier and I really like the dual exhaust look. I had dual tailpipes on my '03. The magnaflow's out each side. I do like the look of the banks dual tailpipe setup but Gale likes his stuff and the pricetag shows it. Maybe when the budget allows it a turbo-back straight pipe and the necessary tune would be the way to go. Then just find what tailpipes I like and build them into the system or what? The fab work is not a problem. Just funding the tune right now is what I cant do. Just trying to plan. So basically, is there a muffler/tailpipe setup that produces a nice throaty sound better than any other?
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post #9 of 21 (permalink) Old 02-05-2009, 01:14 AM
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Quote:
Originally Posted by supr87gt View Post
Actually with 2 turbos, I doubt the use of a muffler is all that effective (besides building backpressure). 2 turbos on an engine will quiet it significantly as it is. My 80mm turbo mustang (1000hp) with a straight pipe on it sounds relatively similar to my heads,cam, intake motor (350 hp) with true dual flowmasters. I just want something throatier and I really like the dual exhaust look. I had dual tailpipes on my '03. The magnaflow's out each side. I do like the look of the banks dual tailpipe setup but Gale likes his stuff and the pricetag shows it. Maybe when the budget allows it a turbo-back straight pipe and the necessary tune would be the way to go. Then just find what tailpipes I like and build them into the system or what? The fab work is not a problem. Just funding the tune right now is what I cant do. Just trying to plan. So basically, is there a muffler/tailpipe setup that produces a nice throaty sound better than any other?
Sweeeet

The muffler basically does nothing to the sound of the exhaust.

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post #10 of 21 (permalink) Old 02-05-2009, 12:51 PM
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Sweeeet

The muffler basically does nothing to the sound of the exhaust.
So...basically a straight pipe (assuming an off-road vehicle of course) and whatever tails I want for the appearance? Will that give it a rumble?

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