"Fits perfect"
Cummins
Shop All
Quick Ship
Expert Pick
SKU #: PPE-117000500
MPN #: 117000500
PPE 3" Stainless Down Pipe 04.5-10 6.6L LLY / LBZ / LMM Duramax
Description
Removing factory restrictions in the exhaust of your Duramax not only improves overall performance, but it can also help with fuel economy as well. The factory downpipe in your GM Duramax is highly restrictive due to the crushed, oval shaped section right off the back of the turbo. This restriction does not allow the full performance capability of your engine and after tuners and other horsepower enhancing products have been added, the stock downpipe is the reason for your high EGT's and poor throttle response. Remove your crushed oval stock down pipe and replace it with a smooth 3" round, long lasting, down-pipe from PPE. This down-pipe is constructed from 304 stainless steel and is spiral heat wrapped with titanium woven thread with stainless steel clamps to help reduce engine bay temperatures and get the most out of your engine.
APPLICATION INFO:
This down pipe is Compatible with factory or PPE Up-Pipes
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.
IMPORTANT NOTES:
- Includes downpipe, heat shield, clamps for heat shield, and lower gasket
- Does not include exhaust clamps
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 04.5-10 GM 6.6L Duramax
The stock down pipe on your LLY, LBZ, or LMM 6.6L 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: 4.964286 / 5 from 28 reviews.
AI Generated Review Summary
The PPE 3" Stainless Down Pipe for Duramax engines is praised for its easy installation, perfect fit, and excellent quality. It improves engine performance and fuel economy by removing factory restrictions and reducing engine bay temperatures.
Summary topics
- Installation Ease: 24%
- Product Quality: 24%
Review topics: ["fit","looks","service","install","quality","fitment","issues","shipping","sounds","wrap","pipe","welds"].
Review highlights
- "Perfect fit install wasn’t to terrible great quality" —
- "Easy install, awesome fit and finish." —
- "Excellent quality and perfect fit." —
Reviews
Wrong part
"I have a borgwarner set up , too small unfortunately. . need a 3. 5 IN & 4. 0 OD VBAND downpipe instead. . unfortunately, looked & felt like a great quality part though!"
Downpipe
"Everything fit perfectly however, it would have been nice if it came with new V-clamps. One of mine has some messed up threads. But overall, the welds looked great, heavy duty pipe and very easy installation. I'm sure it has lowered my EGT's as well but I don't have a guage for it yet so I cannot say."
Quality sound and fit no
"Quality sound and fit no problem to install in your own garage over the weekend. Price is good wish I done it sooner"
Downpipe
"Exactly what I needed great customer service I will differently be ordering more stuff"
Excellent quality and perfect fit.
"Excellent quality and perfect fit. Hopefully I will never need another one however I would definitely buy again for a different truck"
Great sound and performance
"This pipe made my truck not only sound great but also dropped the egt like the rock dropping the peoples elbow"
Honest review?
"I read a few reviews saying it was not super hard to install!! It was a bit of a struggle. I’m no mechanic and have few tools but it’s totally doable! As for the product it’s self? It’s clean smooth and seems really well designed. Fitment was awesome and I can feel a lot more bottom end snappyness on the throttle. Totally worth the struggle putting it in! And it’s cheaper than most competitors. I recommend it for sure!!!"
Perfect
"Fit perfect. Install was not easy cause lets face it its tight. Solid quality"
05 lly down pipe
"Can definitely hear my turbo alot more and it seems to spool faster. kind of gave my exhaust a deeper rumble. 10/10 build quality clean and sturdy. Once the stock pipe is removed installing this was a breeze."
Q&A
- Will this fit with high flow up pipes?
- Yes, those will fit together on that application.
- The stock clamps don't fit over the flanges on turbo side and exhaust side what clamps do I need
- That seems odd as the flanges should allow the factory clamps to work, but obviously something is not allowing it to. For replacement clamps, see the below options for each: https://www.dieselpowerproducts.com/p-dorman-turbo-downpipe-v-band-clamp-45-16-gm-66l-duramax-llylbzlmmlml https://www.dieselpowerproducts.com/p-dorman-exhaust-downpipe-v-band-clamp-01-16-gm-66l-duramax-lb7llylbzlmmlml Please feel free to contact us if you continue to have issues and we'd be happy to help out.
- Will this work with ppe up pipes and headers?
- Depending on the year it may or may not. Please feel free to reach out to one of our experts Mon-Fri 6-6 pst. 888-993-4373 Thank you.
- does this down pipe come with clamps?
- It does not, they are typically re-useable. -Sands
- It doesn’t seem like the stock exhaust clamp fits around the flanges. Is there a different exhaust clamp that will work?
- Is the issue the upper flange at the turbo? Or the lower flange? I have never personally had a fitment issue with those downpipes. can you take some pictures perhaps? If you can please send them to sands@dieselpowerproducts.com -Sands