Home > 4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER-2
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER-3
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER-4
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER-2
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER-3
4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe |SPETUNER-4

4'/5' 2001-2004 LB7 6.6 Duramax DPF Delete Race Pipe

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Product Information +

SPEtuner DPF Delete Kit for Duramax LB7 - 4"/5" 2001-2004 6.6 Duramax DPF Delete Race Pipe

Upgrade your 2001–2004 Chevy or GMC LB7 Duramax 6.6L with a high-performance Duramax DPF delete kit from SPEtuner. Available in 4” or 5” diameter, this downpipe-back exhaust section is designed to eliminate the restrictive DPF system, improving horsepower, fuel economy, and engine longevity.

✅ T409 stainless steel construction
✅ 2mm wall thickness – heavy-duty durability
✅ Compatible with factory downpipe & hardware
✅ Includes all clamps, bolts & instructions
✅ Fits 2001, 2002, 2003, 2004 LB7 Duramax 6.6L

Key Benefits

Specification Details
Product Type DPF Delete Race Pipe (Downpipe-Back)
Compatible Models 2001–2004 Chevy/GMC LB7 Duramax 6.6L
Pipe Diameter Options 4” or 5”
Material T409 Stainless Steel
Wall Thickness 2mm
Includes Hardware Yes – clamps, brackets, bolts
Works with Stock Downpipe Yes
Cab & Chassis Fitment No – requires a special extended pipe

Why Choose SPEtuner’s DPF Delete Race Pipe for LB7 Duramax?

✅ Restore Power & Torque

Eliminates backpressure from the DPF, helping your Duramax engine breathe freely again. You'll feel the difference in throttle response, especially when towing or climbing.

✅ Improve Fuel Economy

Free up airflow, reduce restriction, and gain up to 3–5 MPG—put more money back in your pocket with fewer stops at the pump.

✅ Reduce Maintenance Headaches

No more DPF clogs, regens, or expensive replacements. This simple upgrade eliminates a major failure point in aging diesel systems.

✅ Built for Performance & Longevity

T409 stainless steel construction resists corrosion and handles extreme temperatures. With 2 mm-thick walls, this pipe is ready for tough driving conditions, from daily hauls to off-road trails.

DIY-Friendly Installation

  • Time Required: Approx. 1 hour

  • Tools Needed: Basic hand tools

  • Instructions Included: Yes – printed guide + QR for install video

  • No welding required – direct bolt-on with included hardware

  • Fits OEM downpipe – retains factory bolts and flanges

Pro Tip: Lay out all tools and parts before starting. A little prep makes the install even faster.

⚠️ Important Notes

For off-road and race use only. This product removes emissions equipment and is not legal for use on public roads in many states. Please check your local regulations before installing.

Frequently Asked Questions about the LB7 Duramax DPF Delete Race Pipe

Do I need a tuner with this DPF delete pipe?

Yes. Removing the DPF system requires a compatible tuner (such as EZ Lynk or H&S Mini Maxx) to recalibrate your ECU and prevent engine codes or limp mode. You can view our compatible tuners here.

Is this delete pipe compatible with Cab & Chassis models?

No. Cab & Chassis trucks have longer frames and require extended pipes. This kit is designed for standard pickups. Please check the product title or contact us for Cab & Chassis versions.

Is any welding required for installation?

No. This is a true bolt-on kit. It connects to your factory downpipe using the included clamps and hardware — no welding or cutting needed.

What’s the difference between 4” and 5” exhaust pipes?

4” systems are quieter and easier to fit in tight spaces. 5” systems provide improved airflow and a deeper exhaust note. Both offer performance gains — choose based on your sound preference and clearance.

Is a DPF delete kit legal in my state?

DPF delete kits are for off-road and race use only. They are not legal for use on public roads in the United States or Canada. Please check your local emissions regulations before purchasing or installing.

What problems can occur after deleting a Duramax DPF?

When tuned correctly, DPF deletion generally improves performance and reliability. However, improper tuning can cause poor drivability, fault codes, or even engine damage. Always use a proven tuner and install the system correctly.

How much horsepower can a DPF delete add to my LB7?

Deleting the DPF combined with proper tuning can restore or gain up to 30–50 HP, depending on supporting mods like intake and turbo. It also improves throttle response and torque for towing or off-road use.

Why do people delete the DEF system along with the DPF?

The DEF system adds complexity, cost, and maintenance. Many owners delete both the DPF and DEF systems to simplify the exhaust, improve performance, and eliminate the need to refill DEF fluid — strictly for off-road use.

Is it illegal to delete a diesel truck in 2025?

Yes. Federal and state regulations prohibit emissions system deletions on road-registered vehicles. Enforcement has increased, and penalties can apply. Our delete products are strictly intended for off-road/racing applications.

Which Duramax years should I avoid for DPF deletes?

The 2007.5–2010 LMM models can be tricky due to complex emissions integration. LB7 (2001–2004) models like this one are ideal for deletes due to their simpler systems and lack of factory-installed DPF or DEF in stock form.

 

Ready to Upgrade Your LB7?

Take your 2001–2004 Duramax to the next level with this high-performance DPF delete race pipe. Choose your pipe diameter, add it to the cart, and experience the power and efficiency your LB7 was built for.

👉 Need a tuner too? Check out our LB7 delete tuner options >
👉 Want the full delete solution? View our All-In-One Delete Kits >

Let customers speak for us

from 149 reviews
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

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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!

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

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

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Matt Mcclure
Great Item

Great item that fit my ‘14 F250! Works beautifully!

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Awesome

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Darrell Walker
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It made a big big difference it awesome

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randy prough
Great product

So far the ccv delete kit has worked as it should very happy with the outcome and took care of the oil leak that I had from the ccv junk box

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