Downpipe
"Great fit and really lowered EGT’s"
Cummins
Shop All
Quick Ship
Expert Pick
SKU #: PPE-117000700
MPN #: 117000700
PPE 117000700 3" Stainless Down Pipe 15.5-16 GM 6.6L Duramax LML
Description
Would you drink a milkshake through one of those little coffee stir-style straws you get at the gas station or church? Of course not! You want a straw that's going to deliver that chocolate goodness in a hurry and without a lot of effort. So why are you still forcing your turbo to use a small flat down pipe in your LML? It wants to move air and be efficient, but that crushed oval looking pipe isn't letting it breathe easy. PPE has the solution with their Stainless Down Pipe for the 15.5-16 LML Duramax. Crafted from 304 Stainless for longevity and reliability and formed with a clean lined flange to a smooth proper round tube for more efficient airflow. Let your turbo breathe easier, and keep your under-hood temperatures down, as the PPE unit is also wrapped in a titanium woven thread for superior heat protection for your other components.
Enter your zip and we'll see if installation is available.
- Request quotes from local installers at checkout
- Compare options and choose the best fit for your install
About WrenchConnected
WrenchConnected is an independent installation marketplace operating in partnership with Diesel Power Products.
How it works
After checkout, we route your vehicle info and part SKU to verified installation shops near you. Local installers review the job and submit competitive bids; you pick the shop you want based on price, reviews, and availability. Your name and email stay private until you select an installer.
Pricing
You pay for the bid from your preferred shop. The full amount is shown before you confirm — installers cannot add charges without your written consent. Payments are processed securely by Stripe.
Your privacy
During bidding, shops see only your service ZIP code, vehicle year/make/model, and the part SKU — not your name, email, or address. Only the shop you select receives your contact details after payment. We never sell your personal information.
More detail at wrenchconnected.com.
About PPE (Pacific Performance Eng.)
Browse PPE Diesel Parts Online by Make, Model, and Year.
Originally founded in 1985, Pacific Performance Engineering (PPE) is leading the way in the progression of diesel performance. Their roots started them in the diesel performance industry installing other manufacturers kits and components, which led to the release of their original product, the Duramaximizer, in 2001 to improve upon the power and efficiency of the LB7 Duramax, and is still in use today. Today, they are known for manufacturing dual CP3 kits, their line of Xcelerator programmers for numerous applications, upgraded oil pans, and nearly anything you can think of to improve the power and extend the life of your Duramax, Cummins or Powerstroke.
Video
Product Overview: PPE 3" Stainless Down Pipe 11-16 GM 6.6L Duramax
The stock-down pipe on your 11-16 6.6L LML Duramax is not doing you any favors when it comes to performance and sound. Installing this drop-in unit from PPE will allow exhaust to exit the turbo quicker which nets you more power and lower EGTs. Plus the heat wrapping will keep the heat in the exhaust, not the cab. It’s a win-win-win.
Blog
December 12, 2024
Since 2007, every on-road diesel vehicle in the U.S. has been outfitted with a Diesel Particulate Filter...
Read MoreThe Latest Diesel Particulate Filter (DPF) Technology
October 10, 2019
It seems like nowadays, everyone is in a hurry, and wants a fast truck to get them...
Read MoreHow to Create Power and Stay Emissions Compliant
June 12, 2026
The diesel particulate filter (DPF) on your Cummins engine traps soot before it leaves the tailpipe. Over...
Read MoreCummins DPF Cleaning: Signs, Methods & Tips
June 12, 2026
P2509 flags when your Cummins ECM isn't seeing stable voltage coming from the battery and charging system....
Read MoreP2509 Cummins Code: Causes, Symptoms & Fixes
Overall rating: 4.8333335 / 5 from 6 reviews.
AI Generated Review Summary
Summary topics
Review topics: [].
Review highlights
Reviews
High Quality!
"High Quality!"
Downpipe
"No issues at this time but not many miles. Difficult to install. Quality appears to be quite good, well built."
Great
"Truck feels alot lighter and sounds better"
Pretty loose fit. . may suggest
"Pretty loose fit. . may suggest ordering a gasket with this item. I don't know if all the brands would be loose fitting as this one."
Perfect effortless fit!
"Perfect effortless fit!"
Q&A
- How difficult is this to install myself. And it won't set off check engine light? Also I would be interested in a lift pump for my lml I want to ask which one is the easiest to install fast is the one I prefer I will consider your recommendation on this my truck only has 84K on it and I just want to keep it running. Thank you for your time.
- The downpipe is tight to get to and time consuming, as far as a lift pump, I would suggest the Fass Titanium Signature Series, 100 gallon per hour rated, those kits come with everything for plug n play install.