• Dieselr Aluminized Downpipe Back Exhaust Single | GM 2500/3500 6.6L DURAMAX L5P 2020-2025 Aluminized Race Pipe Dieselr Parts 4-inch Exhaust with Muffler
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  • Aluminized

Dieselr Aluminized Downpipe Back Exhaust Single | GM 2500/3500 6.6L DURAMAX L5P 2020-2025

Dieselr Aluminized Downpipe Back Exhaust Single | GM 2500/3500 6.6L DURAMAX L5P 2020-2025

Dieselr Parts

SKU: 256-720134

$853.00 USD
$900.00 USD $853.00 USD Sale
Shipping calculated at checkout.
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Quick Specs

Material American aluminized steel 🇺🇸
Tubing 16-gauge, mandrel-bent in Canada 🇨🇦
Hangers Contour-bent, OE locations
Clamps Perfect Fit Lap Joint Exhaust Band clamps
Fitment Direct bolt-on; no cutting required

Vehicle Fitment

Make
6.6L L5P GM Duramax
Year(s)
2020-2025
Product type
Aluminized Exhaust

The Dieselr Aluminized Downpipe Back Exhaust (2020–2025) is designed for diesel platforms that need dependable performance, consistent flow, and strength that lasts. Built from 4-inch, 5-inch heavy-gauge aluminized steel, this system provides a smooth, unrestricted exhaust path that maintains lower EGTs and steady pressure under load.

Every Dieselr system is mandrel-bent to preserve flow efficiency and TIG-welded for long-term integrity. The aluminized coating resists rust, road salt, and heat stress—ensuring years of service in demanding conditions. Installation is simple and secure, featuring factory-style hanger alignment for a clean, professional finish.

Dieselr exhausts are field-tested and refined through real-world use, proving their durability and precision where it matters most—on hardworking diesels built for power and reliability.

Key Features

  • 4″,5" aluminized steel construction for corrosion-resistant strength
  • Mandrel-bent tubing for smooth, efficient exhaust flow
  • Factory-style fitment for simple, tight installation
  • Proven performance under heat and heavy load

FAQs

Aluminized vs. stainless — which should I choose?
Aluminized offers excellent value and everyday durability; stainless maximizes corrosion resistance in harsh climates. Sound and flow are comparable in like-for-like systems.
Will this system drone?
Our bend geometry and muffler selections minimize cabin drone at highway speeds while preserving a confident diesel tone.
Is it truly bolt-on?
Yes—OE locations, contour-bent hangers, and Perfect Fit Lap Joint Exhaust Band clamps simplify install with hand tools. Remember to re-torque clamps after 100–150 miles.

Why Dieselr Aluminized?

Dieselr Corp delivers diesel performance parts engineered for a clean fit, durable service life, and confident sound control. Our aluminized systems balance corrosion resistance, weight, and cost for daily duty and long-haul reliability—backed by real human customer service.

  • American-sourced aluminized steel, mandrel-bent in Canada
  • 16-gauge tubing with contour-bent hangers for OE-clearance
  • Perfect Fit Lap Joint Exhaust Band clamps for a secure, leak-resistant, direct-fit install
  • Designed to maintain exhaust velocity and reduce drone

For maximum results, pair with our Dieselr Signature EGR Upgrade Kits and industry-leading Dieselr performance tuning.

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