Exhaust install - Chevy and GMC Duramax Diesel Forum
General Discussion General Diesel Discussion.

LinkBack Thread Tools Display Modes
post #1 of 15 (permalink) Old 11-09-2019, 12:01 AM Thread Starter
AKChevyGuy's Avatar
Join Date: Nov 2019
Posts: 5
Exhaust install

Just bought a 2017 L5P. I’m putting an aFe Atlas dual exhaust on it. The stock exhaust has 3 sensors downstream of the DPF. The new exhaust only has two. Anyone else run into this problem?
Attached Images
AKChevyGuy is offline  
Sponsored Links
post #2 of 15 (permalink) Old 11-09-2019, 06:30 AM
DuramaxForum Fanatic
SilverGorillaLML's Avatar
Join Date: Feb 2015
Location: The mountains of va/wva listen for the banjos
Posts: 9,793
Not 100% sure but it appears to be an egt sensor thats hanging. May want to call afe and ask them about it or who you got the exhaust from. It will either throw a cel for it or just max the egt sensor out on a gauge. Ones a problem one isnt.
SilverGorillaLML is offline  
post #3 of 15 (permalink) Old 11-09-2019, 07:54 PM Thread Starter
AKChevyGuy's Avatar
Join Date: Nov 2019
Posts: 5
I’m thinking I’ll cut the bing out of the old one and weld’er into the new one
AKChevyGuy is offline  
Sponsored Links
post #4 of 15 (permalink) Old 11-09-2019, 07:55 PM Thread Starter
AKChevyGuy's Avatar
Join Date: Nov 2019
Posts: 5
AKChevyGuy is offline  
post #5 of 15 (permalink) Old 11-09-2019, 08:16 PM
Senior Member
denarli6.6's Avatar
Join Date: May 2018
Posts: 654
That's what i would do

2016 LML Denali 2500
Mcgaughy's 2" drop shackle
Bilstein 5100
22x10 American Force Flux black w machined or Toyos on OEM wheels. Depends on the day of the week
Wehrli S300 kit w/ 66mm SXE
Wehrli CP3 conversion 10mm stroker
Profab Manifold & Up-pipes
Stock Trans For Now
Stock Sticks For Now
Air Dog 165 4G
denarli6.6 is offline  
post #6 of 15 (permalink) Old 11-10-2019, 11:00 AM
Duramax Lifetime Supporter
monkeyman's Avatar
Join Date: Nov 2016
Location: Grays Lake,IL
Posts: 573
Send a message via AIM to monkeyman
I put dual exhaust on and had to shorten one pipe so the lead would reach, not much give over there

To many vehicles to little time! New LP5 owner first 2017 GMC Denali Duramax
monkeyman is offline  
post #7 of 15 (permalink) Old 11-12-2019, 07:36 AM Thread Starter
AKChevyGuy's Avatar
Join Date: Nov 2019
Posts: 5
I wish I had read the reviews on aFe before I purchased. I’m not impressed. Besides the absence of the sensor bung, the fitment pretty much sucks. The outlets are impossible to match. Spent hours twisting, adjusting and cussing. Nowhere in their instructions does it say you’ll need a torch to install. You will if you want your tips to somewhat match.

I cut the bung out of my stock exhaust and welded it into the new one. Seems to have worked.

Thanks for the replies👍
AKChevyGuy is offline  
post #8 of 15 (permalink) Old 11-12-2019, 09:28 AM
LHN...We ARE the Joneses
Hook'em_Horns!'s Avatar
Join Date: May 2008
Location: Awww-stin, TX
Posts: 25,976
Send a message via Yahoo to Hook'em_Horns! Send a message via Skype™ to Hook'em_Horns!
What am I missing here?
A balanced look?
Dual thrusts for launches?

A single on one side.....is like living with crooked pictures hanging on every wall in the house.

So let's put a huge oversized tip on the single.
That'll blend.

2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air

Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab
I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"

Last edited by Hook'em_Horns!; 11-12-2019 at 09:30 AM.
Hook'em_Horns! is online now  
post #9 of 15 (permalink) Old 11-12-2019, 09:38 AM
Junior Member
Collins's Avatar
Join Date: Dec 2018
Location: Decatur, AL
Posts: 168
It's called symmetry.........

For some one as OCD as me, it's either that or medication.
eli_harper13 and Sierraluva like this.

2019 Silverado 2500 4WD, Cajun Red
Michelin LTX M/S, bed liner, Alum bed box
Boost mirror turn signal jumper
Trans cooler grill
Collins is offline  
post #10 of 15 (permalink) Old 11-15-2019, 10:38 PM
Junior Member
Join Date: Apr 2014
Location: colorado
Posts: 77
I think dual exhaust looks good on all trucks but for functionality it does nothing for these new diesels that have the def system unless you can engineer a dual dpf with dual sensors and yatta yatta yatta. That being said from the outside looking in it makes the truck look meaner unless its 9 inch stacks like really boys these freightliners and mac's and peterbuilts dont even have that big of stacks let's get real and the Cummins with dials is that for bank 1 and bank 2? Is that front 3 pistons and back 3 pistons? Cause I know that's not how its plumbed but whatever it is what it is I think the the dual pipes out the back looks good but more functional on gassers

ChevyCowboy2013 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome