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Description
2020-2026 Duramax 6.6 Stainless Steel 5" Full Exhaust - WITH MUFFLERThis is a 5" Downpipe back single exhaust system that compares to the 20151NM or SS20151NM system by FLO PRO and similar systems by MBRP and Jamo for the 2020 2026 6. 6L, 2500 3500 W OEM 4 BOLT FLANGE EC CC SB LB DUALLY, PICKUP ONLY. This kit allows you to remove the restrictive OE exhaust system, it will open up your exhaust system and lower your EGTs. This exhaust system INCLUDES a muffler and is intended for race trucks only. Comes with all the
This is a 5" Downpipe back single exhaust system that compares to the 20151NM or SS20151NM system by FLO-PRO and similar systems by MBRP and Jamo for the 2020-2026 6.6L, 2500/3500 W/ OEM 4-BOLT FLANGE EC-CC/SB-LB-DUALLY, PICKUP ONLY. This kit allows you to remove the restrictive OE exhaust system, it will open up your exhaust system and lower your EGTs. This exhaust system INCLUDES a muffler and is intended for race trucks only. Comes with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you cruise through the installation process. This kit not only sounds great, but will improve fuel mileage, throttle response, and torque in your 6.6L.
Features:
- 5" Downpipe Back Race Exhaust
- INCLUDES Muffler
- Easy Install
- STAINLESS STEEL - NO CHEAP ALUMINIZED STEEL HERE!!
- Single Side Exit
- This exhaust is designed to work with our aftermarket downpipe available HERE
-
Exhaust will work with most other aftermarket downpipes and may work with OEM downpipe, but again, it is designed to work with our downpipe for guaranteed fitment.
Manufactured by ProPower Diesel in the USA.
IMPORTANT NOTE
In 2017, GMC made a production change in the connection between the catalytic converter and the turbo direct pipe on the L5P. Please ensure you have the newest 4-bolt style flange before ordering.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 4
Back to the 70s
I love these. They fit perfect in the waist but are roomy else where.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 21, 2025
★★★★★ 5
My favorite ever jean, I have a pair in every color
Size: 26, Color: Not My News Channel
I’m a little lanky (5’9”, 125-130lbs) and I want to like wide leg/baggy jeans so bad but every time I try them on, they look ridiculous on me. I look like a straight line in them, or they’re so baggy I feel like I’m wearing a costume. These have the baggy look I’ve been searching for for years but in an understated way that doesn’t make me feel shapeless. I’m also convinced that the buttons are more flattering over the fupa than a zipper. It’s like a hidden corset vs. a zipper that contours to your shape.
If you’re in between sizes, definitely size down. Even if you’re not, you may still want to size down or buy both and return the one you don’t like
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 26, 2026
★★★★★ 1
Too short
Size: 29W x 30L, Color: Ecru Booper No Damage
Sadly not meant for tall people.
I am 6” and these jeans are at least 3 inches too short, so i will be returning them. Disappointing that they don’t come in tall.
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Reviewed in the United States on January 29, 2026
★★★★★ 3
Horrible sizing & inconsistent fit
Size: 27W x 30L, Color: Ecru Booper No Damage
This pant does not fit the same as other colors from the same line/fit. I ordered this color and a light wash 501 90s Jean from Amazon after trying them on at Aritzia and both fit nothing like in store. This color has more fabric in the pocket area, making it wrinkly and unappealing when worn.
I am usually. 25” waist (size 2-4 depending on brand), and I had to order a 27” for this to fit around my waist, so size up. I don’t think Levi’s work for curvy girls. I am 125lbs, 5’3”, and an hourglass shape. Levi’s don’t fit comfortably on my hourglass figure, which is unfortunate that such a famous brand still hasn’t perfected a fit for curvy people.
The color, thickness, quality, and length were good though, but ultimately returning as it simply doesn’t look good on.
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Reviewed in the United States on April 3, 2025
★★★★★ 5
New mom jeans
Perfect Jean for my new postpartum bod! Was sad that none of my old jeans fit. I Was mourning them really-then I decided to just bite the bullet and buy some new jeans in my new size and these are them! They are relaxed enough for me to bend at the knees and not feel like I’m cutting off blood, but fitted enough that I don’t look like a slouch. I could technically have gone a size down and would have liked them but I appreciate some give in this phase of life. For reference I am 5’6 and 129 lbs and I got a 27
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Reviewed in the United States on September 9, 2025
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