Exhaust System

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Popular Diesel Exhaust Categories:

  • Exhaust Pipes: Including 4" and 5" exhaust pipes, straight pipes, and turbo-back kits
  • Exhaust Mufflers: Standard replacements and muffler delete pipes
  • Exhaust Gaskets & Y-Pipes: Seal your system and optimize flow
  • Up-Pipes & Downpipes: Precision-fit pipes for smoother turbo response
  • Complete Kits: Full exhaust system packages for Duramax and Powerstroke builds

Fitment Coverage:

Our exhaust parts are built to fit:

  • 2001+ Duramax (LB7, LLY, LBZ, LMM, LML, L5P)
  • 2003–2019 Powerstroke (6.0L, 6.4L, 6.7L)
  • RAM 1500 diesel exhaust systems coming soon!

Why Choose SPETUNER Exhaust Components?

  • High-grade 409 stainless steel construction
  • Bolt-on design—no welding required
  • Compatible with DPF/DEF/EGR delete kits
  • Designed for off-road durability and performance

FAQs

Q: Will these exhaust components fit my 6.6L Duramax or 6.7L Powerstroke?
A: Yes! Our downpipes and up-pipes are designed to fit popular models from 2001+ Duramax (LB7, LLY, LBZ, LMM, LML, L5P) and 2003–2019 Ford Powerstroke trucks (6.0L, 6.4L, 6.7L). Always check each product page for full fitment details before ordering.

Q: Are these parts compatible with DPF/DEF delete kits?
A: Absolutely. Our exhaust products are engineered for off-road use and work perfectly with DPF, DEF, and EGR delete setups. These components help reduce back pressure and improve airflow in delete-ready diesel systems.

Q: What material are these exhaust parts made from?
A: All SPETUNER exhaust pipes, downpipes, and up-pipes are crafted from high-quality stainless steel—either 304 or 409 grade—offering excellent durability and corrosion resistance even under extreme heat.

Q: How do I know if I have an exhaust leak?
A: Common signs include ticking sounds at startup, a drop in fuel efficiency, loss of power, strong exhaust smell in the cabin, or black soot around joints. Leaks often occur at flex pipes, gaskets, or weld points. Upgrading to high-quality stainless steel components can solve this.

Q: What’s the difference between a muffler delete and a straight pipe exhaust?
A: A muffler delete removes only the muffler, keeping the rest of the exhaust system intact. A straight pipe exhaust eliminates all sound-reducing components—muffler, catalytic converter, resonator—resulting in maximum airflow and loudest sound. Straight pipes are often used in race/off-road applications.

Q: Is deleting the muffler or DPF legal?
A: In most regions, muffler or DPF delete modifications are not street-legal and are intended for off-road or race use only. SPETUNER exhaust components are sold for off-road use, and buyers are responsible for compliance with local laws.

Q: What is back pressure and why does it matter in diesel exhaust systems?
A: Back pressure is the resistance created by the exhaust system that pushes against engine exhaust gases. In diesel engines, lowering back pressure improves turbo spool-up, reduces EGTs (exhaust gas temperatures), and enhances performance—especially when using free-flowing downpipes or up-pipes.

Q: What causes black or white smoke from my exhaust pipe?
A: Black smoke usually indicates excess fuel or poor tuning—common in deleted or tuned trucks. White smoke can signal coolant leaks, unburned fuel, or oil burning due to turbo seal or piston ring wear. Proper tuning and high-quality exhaust components help minimize these issues.

Q: Do SPETUNER exhaust components require welding?
A: No welding is needed. All our parts are bolt-on, and designed for direct factory-fit installations. However, professional installation is recommended for best results and leak-free performance.

Q: Do you carry 5" exhaust pipes?
A: Absolutely. Our 5" kits are popular for Duramax and Powerstroke setups seeking maximum flow and aggressive sound.

Upgrade your diesel truck with confidence—SPETUNER exhaust systems deliver power, sound, and durability that lasts.

Disclaimer SPETUNER’s delete kits are intended for off-road or racing use only. They may not be street-legal in all areas, so please verify local laws before installation. Professional installation is strongly recommended to ensure the best results.

Let customers speak for us

from 175 reviews
For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
John Patterson
5” exhaust

Honestly, the exhaust was much nicer than I expected fitment wise. It fit just as well if not better than exhaust systems I have installed in the past that were a few hundred more dollars. Shipping time was pretty good as well… received it the same week I ordered it. That’s about all I can speak on for now as I have only put about 100 miles on it.

For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
DPF/DEF/EGR Delete 2007-2009 6.7 Cummins Dodge Ram 2500 3500 All-in-One Kit
Chris Edwards
Slick kit and the best bang for the buck out there

Everything you need and nothing you don't. The parts install really impressively smoothly.

Could definitely use better / ANY instructions, especially since youtube vids on deleting trucks have been taken down lately.

It took a day of searching and watching vids here and there to find out it is extremely important to go in a certain order:
1: install the tuner first
2: install a "smog equipment has been removed" tune even though the truck still has the equipment at the moment.
3: remove the dpf and egr bits

DPF/DEF/EGR Delete 2007-2009 6.7 Cummins Dodge Ram 2500 3500 All-in-One Kit
DPF/DEF/EGR Delete 2011-2019 6.7L Powerstroke All-in-One Kit
Vern Olson
Glad I bought it

Money well spent. Install was simple. Do not misunderstand simple with easy. Although it was easy for me. Install of the MINI MAXX V2 was a bit different. The video provided on the site was not how my installation went. In fact it was very different. With that, it did go as expected. The tuner does have some what of a learning curve, not very much info out there now with all the bureaucratic garbage we, in the US, have to contend with. It is out there, just TOUGH to glein. The removal of that gargantuan nightmare of an exhaust filter was not for the faint of heart. It is heavy, and the connectors on all those sensors can be challenging. It will be worth the struggle. The removal of the Extra Grace Required part was the hardest part for me. Having had my exhaust and turbo out 2 times, one of the bolt heads got damaged in the last re-install. That took a huge amount of patience and correctly applied downward force and a special tool. FYI THE PYROS DO NOT READ CORRECTLY ON 2011 F350 IT WILL ONLY READ 1193°!
Then the block off bypass parts, easy install. Looks great and does everything I expected. As a plumber I was able to use some expansion couplings and cut the water tubes and did not use the supplied hose. Then back on the ground to install the exhaust pipe. That was a challenge. The hanger bracket wasn't quite on par and was bent a bit. Nothing like a torch and a quality set of Pittsburgh 3/4" box end wrenches. Got that squared away, lined everything out and the slip joint went in nicely. I only used one of the 3 bolt flange bolts because I saved 2 of the pressed in studs. The down pipe connector flange was a special kind of hurrah. Perseverance, busted knuckle, and lots of upward pressure, accomplished that.! Overall I like the kit, don't like it doesn't come with instructions, but if you're buying this kit I'm betting you're already a mechanic anyway. HUGE THANKS TO SPETUNER.
One more thing, FedEx delivered my 1st kit to 2 wrong addresses, SPETUNER made it right and sent out a new kit for my. That is worthy of my review!

DPF/DEF/EGR Delete 2011-2019 6.7L Powerstroke All-in-One Kit
DPF/DEF/EGR Delete 2008-2010 Ford 6.4L Powerstroke All-in-One Kit
N. Simpson
Mini Maxx V1

Easy to set up and install on my 2008 F-250. The Mini Maxx V1 tuner with 5" exhaust from the down pipe back and EGR delete has improved my fuel mileage from 15.4 mpg to 19.8 mpg. I also forgot to mention the power it has now it totally turned my truck on!

DPF/DEF/EGR Delete 2008-2010 Ford 6.4L Powerstroke All-in-One Kit
DPF/DEF/EGR Delete for Ram 2010-2012 6.7 Cummins All-in-One Kit
Warren Louwien
2012 6.7 Cummins

It works great. My speedometer finally reads correctly. My fuel mileage went from 11.5 mpg to15 mpg.

DPF/DEF/EGR Delete for Ram 2010-2012 6.7 Cummins All-in-One Kit
DPF/DEF/EGR Delete for 2013-2018 6.7L Cummins All-in-One Kit
Linda Rhodes
Great

Good email communication. Quick delivery

DPF/DEF/EGR Delete for 2013-2018 6.7L Cummins All-in-One Kit
For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
Chris Eaton
Great product great price!

Exhaust was easy to install and sounds great! Nice kit!

For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
Philip Snell

Everything was perfect. Very dyi friendly .

For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
DPF/DEF/EGR Delete 2011-2019 6.7L Powerstroke All-in-One Kit
Benjamin Huey
All in one kit 6.7 powerstroke

Everything works great truck runs and preformes better just what they said it would do

DPF/DEF/EGR Delete 2011-2019 6.7L Powerstroke All-in-One Kit
4"/5" 2007.5-2010 LMM 6.6L Duramax DPF Delete Race Pipe
David Deavers
09 LMM

Pipe was delivered fast and was an easy fit up. Price was the best around.

4"/5" 2007.5-2010 LMM 6.6L Duramax DPF Delete Race Pipe
For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
Brett Rood

For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500

For 4"/5" 2004.5-2007 5.9L Cummins DPF Delete Race Pipe Dodge Ram 2500/3500
H&S PERFORMANCE Mini Maxx V1 DPF Delete Tuner
Bobby Y
Mini MAXX v1

Works great, simple to operate

H&S PERFORMANCE Mini Maxx V1 DPF Delete Tuner
DPF/DEF/EGR Delete for 2013-2018 6.7L Cummins All-in-One Kit
david quintanar
2013 ram 3500 6.7

Everything I ordered came in right my truck is running great thank you SPETUNER keep up the good work

DPF/DEF/EGR Delete for 2013-2018 6.7L Cummins All-in-One Kit
4"/5" 2007.5-2010 LMM 6.6L Duramax DPF Delete Race Pipe
Don Heffken
DPF Delete pipe

Great fit. Getting 2-3 mpg improvement for city driving.

4"/5" 2007.5-2010 LMM 6.6L Duramax DPF Delete Race Pipe
EGR/DPF/DEF Delete 2011-2016 LML 6.6L Duramax All-in-One Kit
CAHD IRLBECK

Works very well

EGR/DPF/DEF Delete 2011-2016 LML 6.6L Duramax All-in-One Kit