LMM Exhaust: DPF,Non-DPF,Tailpipes,Full Systems,Codes,Mods - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Fuel System, Air, Exhaust, & Emissions Upgrades Discuss upgrades to the Duramax fuel system and air system. Bigger turbochargers, more turbo chargers, air boxes, exhaust systems, emissions systems, and fuel pumps all go here.
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Old 01-22-2008, 03:40 PM   #1 (permalink)
pa32rt
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LMM Exhaust: DPF,Non-DPF,Tailpipes,Full Systems,Codes,Mods

Ok, I'll start it:

Here is a thread for all LMM exhaust related talks. There have been about 4-5 new questions a day that are covered in several other threads. The LIGHTING / HID sticky thread did (and is doing) so well, I thought it was time to start one about LMM exhaust mods.

At this time, I have put on the MBRP S6026409 DPF-back tailpipe. Highly modified near the axle and back, for the NINE INCHES of rear drop on my particular rig.

Also, at this time, I have the MBRP S6004409 TURBO-back system sitting in the box on my garage floor. I will run that back to the slip-connection-joint that is just in front of the axle on the S6026. So, I will end up with an extra brand-new tailpipe assembly from the S6004 kit. I still figure this is easier and money ahead of manufacturing a new system at a muffler shop from front to rear. Plus, it's all mandrel and stainless.

I am running the Quadzilla Stealth-2 tuner, and have the NON-DPF tunes standing by (on my PC) to load and handle the codes.

Here's my current tailpipe/tip, which will stay with the new system:


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Last edited by pa32rt; 01-22-2008 at 03:46 PM.
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Old 01-22-2008, 04:20 PM   #2 (permalink)
pa32rt
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Side shot

Here is a side shot of the tailpipe after mods to tuck it up, away from the road:



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Old 01-22-2008, 09:09 PM   #3 (permalink)
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ahh finally hopefully this will get all the info together in one place for every one good job on getting the thread started
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Old 01-22-2008, 09:39 PM   #4 (permalink)
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Quote:
Originally Posted by fire0021 View Post
ahh finally hopefully this will get all the info together in one place for every one good job on getting the thread started
EXACTLY. I PM'd DIESEL DUALLY (moderator) and asked if we could do this. As mentioned, especially since it worked so well for the HID/Lighting stuff.
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Old 01-22-2008, 10:29 PM   #5 (permalink)
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More info....

There are 2 kits often sold - catback and turboback. Be aware that turbo back kits are NOT really from the turbo, and are basically a front pipe back kit. To get a true turbo back exhaust, you need a replacement downpipe such as the Diamond Eye 4" downpipe. McRat sells them here: http://www.dieselplace.com/forum/sho...d.php?t=209068

TByrne has an excellent post here: Do You Want To Remove Your DPF? Step Inside To See How! on removing the DPF for off road purposes.

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Old 01-23-2008, 02:34 AM   #6 (permalink)
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LMM Exhaust Thread

Great idea for an exhaust thread pa32rt.
You are right about all the new threads each day for LMM stuff. The lighting thread did work out very well and is still doing good as you said.
This is a great way for LMM guys and new diesel owners to do all the reading in one main thread.

That thread by tbyrne that hut posted is great for anyone who wants to do a turbo back/dpf delete kit. It includes pics and details on what to do.
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Old 01-23-2008, 01:46 PM   #7 (permalink)
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alright guys, I have spent all my time trying to learn about the LLY t know find out I'll be getting an LMM (believe me I'm not complaining) But I have very little knowledge of the new generation. I ordered a 5" MBRP for my LLY I'm just going to assume that this will not work on the LMM, would I be correct ?
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Old 01-23-2008, 04:16 PM   #8 (permalink)
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THE HUGE TAIL PIPE

The huge tail pipe on the lmms is due to the extremely high temperatures the truck sees while in regeneration with the dpf. They let in cool air so your tail pipe doesnt become a torch.
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Old 01-23-2008, 04:26 PM   #9 (permalink)
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Quote:
Originally Posted by TexasTrey View Post
alright guys, I have spent all my time trying to learn about the LLY t know find out I'll be getting an LMM (believe me I'm not complaining) But I have very little knowledge of the new generation. I ordered a 5" MBRP for my LLY I'm just going to assume that this will not work on the LMM, would I be correct ?
Did you order a turbo back kit? if it has the four bolt flange you can still bolt it on after the doc. You will still need tunning since your removing the dpf.
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Old 01-23-2008, 04:33 PM   #10 (permalink)
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I have the DPF back right now. I plan on removing the dpf. should I leave doc or not. also is there a flange from the down pipe on the turbo? any more info or pics would be great. Thanks!

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