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Exhaust Systems

Technical Overview

Competition-grade diesel exhaust systems for Ford Powerstroke, Ram Cummins, GM Duramax, Mercedes Sprinter, and Nissan Cummins platforms. Turbo-back and downpipe-back layouts deliver high flow, quicker spool, and a deep diesel tone. Listings are organized by engine and model year for fast, accurate fitment.

Engineering and Design Advantage

Maximum Flow: 4" and 5" mandrel bends reduce backpressure for stronger mid-range and top-end.

Quicker Spool, Lower EGTs: Optimized routing improves scavenging and heat control under load.

Signature Tone: Aggressive diesel sound; muffler and straight-pipe options available.

Vehicle-Specific Fit: OEM-style hangers and brackets for direct bolt-on installs.

Durable Metals: T409/T304 stainless options resist corrosion and high temperatures.

Collection Includes

Ram Cummins

  • 6.7L Down-pipe Back Competition Exhaust (2013–2018)
  • 6.7L 4" Downpipe-Back Stainless Exhaust System (2019–2024)
  • 6.7L Downpipe-Back Exhaust System (2019–2024)
  • 6.7L Turbo-Back Race Exhaust w/o Muffler (2007.5–2012)
  • 6.7L C&C 5" Turbo-Back Race Exhaust System (2011–2018)

Ford Powerstroke

  • 6.7L 5" Downpipe-Back Race Exhaust (2011–2022)
  • 6.7L 4" Downpipe-Back Race Exhaust (2011–2024)
  • 6.7L 4" Downpipe-Back Stainless Exhaust System (2011–2025)
  • 6.4L 4" Downpipe-Back Exhaust System (2008–2010)
  • 6.0L Turbo-Back Race Exhaust System (2003–2007)
  • 7.3L 5" Turbo-Back Race Exhaust (1999–2003)

GM Duramax

  • L5P Down-pipe Back Race Exhaust System (2017–2023)
  • L5P 4" Down-pipe Back Race Exhaust (2017–2023)
  • LML Down-pipe Back Race Exhaust (2015.5–2016)
  • 6.6L Downpipe-Back Race Exhaust (2011–2015)
  • 6.6L Down-pipe Back Race Exhaust (2001–2007)
  • LMM 4" Down-pipe Back Exhaust (2007.5–2010)
  • LM2 Cat & DPF Race Pipe (2020–2022)
  • Canyon/Colorado LWN 3" Turbo-Back Race Exhaust (2016–2021)

Mercedes Sprinter

  • 3.0L 3" DPF Delete Performance Exhaust (2010–2018)
  • 3.0L 3" DPF Delete Parts Kit (2010–2025)

Nissan Cummins

  • 5.0L Race Exhaust w/ Muffler (2016–2018)

Mufflers & Components

  • Stainless Steel Diesel Muffler T409 4" Diesel Muffler

Key Performance Specifications

Diameters: 4" and 5" systems by application.

Materials: T409/T304 stainless, mandrel-bent.

Layout: Turbo-back and downpipe-back configurations.

How to Find the Correct System

  1. Match engine + year range in the title.
  2. Select turbo-back or downpipe-back.
  3. Choose 4" vs 5" diameter and muffler vs no-muffler.

Related Collections

Frequently Asked Questions

What's the difference between turbo-back and downpipe-back exhaust?
Turbo-back systems replace everything from turbo to tailpipe, while downpipe-back systems start after the downpipe.
How much horsepower gain can I expect?
Properly sized systems typically yield 15-30+ HP by reducing exhaust backpressure.
Will a larger diameter exhaust increase turbo lag?
Properly designed systems actually reduce lag by improving exhaust scavenging efficiency.
Are these systems compatible with emissions equipment?
Race systems are designed for deleted trucks; check local regulations before purchase.
What's the advantage of 304 stainless steel?
Superior corrosion resistance compared to aluminized steel, especially in winter road conditions.

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