• Dieselr Aluminized 4" Cat Back Exhaust Single | GM 2500/3500 6.6L DURAMAX LML 2011-2015 Aluminized Race Pipe Dieselr Parts 4-inch with Muffler
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  • Aluminized

Dieselr Aluminized 4" Cat Back Exhaust Single | GM 2500/3500 6.6L DURAMAX LML 2011-2015

Dieselr Aluminized 4" Cat Back Exhaust Single | GM 2500/3500 6.6L DURAMAX LML 2011-2015

Dieselr Parts

SKU: 256-310134

$678.00 USD
$740.00 USD $678.00 USD Sale
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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 LML GM Duramax
Year(s)
2011-2015
Product type
Aluminized Race Pipe

The Dieselr Aluminized 4" Cat Back Exhaust Single (2011–2015 6.6L Duramax LML) is engineered for GMC Sierra and Chevy Silverado 2500/3500 HD owners who expect dependable fitment, efficient flow, and long-term reliability. Built from 4-inch heavy-gauge aluminized steel, it increases exhaust velocity, reduces EGTs, and delivers a refined diesel tone that means business.

Each Dieselr system is mandrel-bent for unrestricted flow and precision-welded for leak-free strength. The aluminized finish resists heat and corrosion to withstand daily use, towing, and harsh environments. With OEM-hanger alignment, installation is straightforward and factory-clean with no cutting required.

Proven on real Duramax LML platforms, this Dieselr system delivers the sound and strength serious truck owners expect—durable, efficient, and built from steel that works as hard as you do.

Key Features

  • 4" aluminized steel construction for strength and corrosion resistance
  • Mandrel bends for consistent, smooth exhaust flow
  • OEM-hanger fitment for easy, secure installation
  • Tested on 6.6L Duramax LML trucks for verified fit and performance

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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