Exhaust conundrum (muffler after DPF delete?) - Ford Powerstroke Diesel Forum

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post #1 of 4 Old 01-04-2013, 09:06 AM Thread Starter
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Exhaust conundrum (muffler after DPF delete?)

So, when I bought all my stuff I was advised to just do the mbrp delete pipe (4") to the stock over the axle pipe+muff (3.5"). Now, I'm being told, by the same shop (PTP), that I should seriously consider removing that OTA+muff factory stuff and move to 4" to lower my EGTs. So, fine, let's do that. But after looking through all their "dpf back" (delete pipe back too, technically) they don't have one that incorporates a muffler or res in that particular section. What's a guy supposed to do now? Buy a whole new 4" just to get a muffler/res? I was never offered that in the first place with the guy telling me "the delete is just as good, the whole exhaust is just for sound" but now I'm being told otherwise. What the heck?

2012 F250 CCSB 6.7 (3.73 gears) H&S Minimaxx (My own tuning), H&S 64mm turbo kit, H&S Dual Fueler, H&S Low Pressure Fuel System, H&S CCV delete, No Limit s2 Intake, PMF 3-link, PMF traction bars, Fox 2.0s, Icon 2.5" coils, Platinum 20s w/ 295/65 toyo at2s, Airlift bags and wireless controller, TFI 50gal, rollX, AMPboards,
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post #2 of 4 Old 01-04-2013, 10:07 AM
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Originally Posted by jcain View Post
So, when I bought all my stuff I was advised to just do the mbrp delete pipe (4") to the stock over the axle pipe+muff (3.5"). Now, I'm being told, by the same shop (PTP), that I should seriously consider removing that OTA+muff factory stuff and move to 4" to lower my EGTs. So, fine, let's do that. But after looking through all their "dpf back" (delete pipe back too, technically) they don't have one that incorporates a muffler or res in that particular section. What's a guy supposed to do now? Buy a whole new 4" just to get a muffler/res? I was never offered that in the first place with the guy telling me "the delete is just as good, the whole exhaust is just for sound" but now I'm being told otherwise. What the heck?
It just depends on what your looking for, we get customers who want the basic delete which would be a tuner and delete pipe all the way up to a full delete kit with EGR delete, full exhaust, air intake and so on.

You'll be fine with what you have, but a full kit will get you slightly lower EGT's and a little more power but its nothing to fret over. The DPF back kit's usually do not have a muffler because the DPF and CAT do all of the muffling and there would be virtually no difference in sound between a muffled and non muffled DPF back kit while the DPF and CAT are still in place. For what your trying to achieve you would have to get a regular dpf back kit and just a straight through muffler from what ever brand you choose in the appropriate size.
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post #3 of 4 Old 01-04-2013, 12:48 PM Thread Starter
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So I'd have to hack up my dpf delete pipe to cut a muffler in?

2012 F250 CCSB 6.7 (3.73 gears) H&S Minimaxx (My own tuning), H&S 64mm turbo kit, H&S Dual Fueler, H&S Low Pressure Fuel System, H&S CCV delete, No Limit s2 Intake, PMF 3-link, PMF traction bars, Fox 2.0s, Icon 2.5" coils, Platinum 20s w/ 295/65 toyo at2s, Airlift bags and wireless controller, TFI 50gal, rollX, AMPboards,
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post #4 of 4 Old 01-04-2013, 12:59 PM
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Quote:
Originally Posted by jcain View Post
So I'd have to hack up my dpf delete pipe to cut a muffler in?
No the section where the muffler would be on a DPF back kit you would just omit from the installation, its about 30" long. Depending on your wheelbase you may have to trim some of the exhaust section shorter.
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