Skip to content
What is a Catback Exhaust? The Complete Guide to Sound and Performance
October 10, 2025

What is a Catback Exhaust? The Complete Guide to Sound and Performance

If you're looking to upgrade your truck's exhaust system, you've likely heard the term "cat-back." But what is a catback exhaust exactly? This guide explains the catback exhaust meaning, how these systems work, and what you can expect for sound improvements, performance gains, and fuel economy. Whether you drive a diesel Cummins or a gas-powered truck, learn how this popular upgrade can enhance your vehicle.

What is a Cat-Back Exhaust? Understanding the Basics

A cat-back exhaust system (short for "catalytic converter back") is a performance exhaust system that replaces everything from the catalytic converter to the exhaust tips. This includes the intermediate piping, muffler, resonators, and tailpipes while keeping the factory catalytic converter intact.

The define cat back exhaust system simply means: A complete exhaust replacement starting at the outlet of the catalytic converter and extending to the rear of the vehicle. These systems are popular because they typically don't affect emissions compliance while offering noticeable improvements.

Cat-Back Exhaust Benefits: Sound, Performance and MPG

1. Enhanced Exhaust Sound

Cat-back systems significantly improve your truck's exhaust note:

  • Deeper tone without excessive drone
  • More aggressive sound during acceleration
  • Quiet cruising at highway speeds
  • Customizable sound based on muffler choice (chambered, straight-through, or performance mufflers)

2. Performance Gains

By reducing exhaust backpressure, cat-back systems offer:

  • 5-15 horsepower increase depending on vehicle and system design
  • 10-20 lb-ft torque improvement for better towing capability
  • Improved throttle response and acceleration
  • Better exhaust flow for future engine modifications

3. Fuel Economy Improvements

Many users report 1-2 MPG gains after installation because:

  • Reduced backpressure allows engine to work more efficiently
  • Optimized exhaust scavenging improves combustion efficiency
  • Less engine strain during acceleration and cruising

4. Visual Enhancements

Cat-back systems offer aesthetic upgrades:

  • Larger diameter polished tips (stainless steel or chrome)
  • Better rear-end appearance with visible exhaust components
  • Custom tip options (rolled edge, double wall, angle-cut)

Considering Deeper Modifications? Explore Performance Delete Pipes

While a cat-back system offers great improvements within emissions laws, some truck owners seeking maximum performance and sound look to more significant modifications. For off-road and competition use, CAT and DPF delete pipes replace the restrictive factory catalytic converter and diesel particulate filter with a straight-through pipe, drastically reducing backpressure and unlocking substantial power gains.

Here are our top-selling delete pipes for popular diesel platforms:

1.4" DPF & CAT Delete Race Pipe for 2017-2023 6.6L Chevy GMC Duramax L5P

Unleash the true potential of your L5P Duramax. This race pipe is engineered for maximum flow and minimal restriction, bypassing the factory DPF and CAT. It's the perfect upgrade for trucks running custom tunes, resulting in significant horsepower and torque gains, aggressive turbo spool sounds, and reduced engine operating temperatures. Crafted from heavy-duty 4" aluminized steel for durability and perfect fitment.

2017-2023 Chevy/GMC L5P Duramax 4" DPF & CAT Delete Race Pipe for off-road use - maximizes horsepower and reduces EGTs

2. 2011-2023 6.7L Ford Powerstroke 4" Cat & DPF Delete Pipe

Solve the common clogging and regeneration issues of the Powerstroke platform. This delete pipe eliminates the major exhaust restrictions, leading to improved throttle response, enhanced fuel economy, and the iconic straight-pipe diesel sound. A must-have modification for 6.7L Ford owners building a performance-focused truck for off-road use.

2011-2023 Ford Powerstroke 6.7L 4" Cat & DPF Delete Pipe - eliminates regeneration issues and improves turbo sound for off-road trucks

3. 2013-2018 6.7L Ram Cummins Turbo 4" Exhaust Tube Pipe

Specifically designed for the 6.7L Cummins, this kit is your first step towards a full delete. By removing the restrictive catalytic converter, this pipe lowers Exhaust Gas Temperatures (EGTs) and builds a foundation for future performance mods and tuning. Experience a deeper exhaust note and better efficiency.

2013-2018 Ram 2500/3500 6.7L Cummins 4" Catalytic Converter Delete Pipe Kit - reduces exhaust restriction and lowers EGTs

Important Note: These products are designed for OFF-ROAD AND COMPETITION USE ONLY. Installing them on a vehicle driven on public roads is a violation of the U.S. Clean Air Act.

Ready to Maximize Your Truck's Performance?

For premium cat-back exhaust systems and expert advice, visit www.seguler.com  to find the perfect system for your truck!

Final Thoughts: Is a Cat-Back Exhaust Right for You?

A cat-back dpf delete exhaust system offers the perfect balance of improved sound, performance gains, and better fuel economy while maintaining emissions compliance. Whether you want a more aggressive exhaust note, better towing performance, or improved MPG, a quality cat-back system delivers noticeable improvements.

FAQs About Cat-Back Exhaust Systems

Q1: Will a cat-back exhaust void my warranty?

A1: No, a cat-back system won't void your factory warranty. It only replaces components after the catalytic converter, leaving emissions systems intact. Always check your specific warranty terms for confirmation.

Q2: How much horsepower can I gain?

A2: Most quality cat-back systems add 5-15 horsepower, with torque gains of 10-20 lb-ft. The exact improvement depends on your truck's engine and the specific exhaust design.

Q3: Are cat-back systems legal for street use?

A3: Yes, cat-back exhausts are 50-state legal because they don't modify any emissions components. They're designed to meet all federal sound and safety regulations.

Q4: Will it make my truck too loud?

A4: Most systems are designed for a deeper, more aggressive tone without being obnoxious. The sound varies by brand - Flowmaster is louder, while MagnaFlow offers a milder tone.

Q5: Can I install it myself?

A5: Yes, with basic mechanical skills and tools. Most kits include all necessary hardware and are designed for direct bolt-on installation without welding or cutting.Some car models may require manual cutting and adjustment.

Q6: How does it affect fuel economy?

A6: Many users see 1-2 MPG improvements due to reduced backpressure and more efficient exhaust flow, especially during highway driving and towing.

Q7: Do I need to retune my engine after installation?

A7: No, a cat-back exhaust alone doesn't require a tune. However, adding other modifications like cold air intakes may benefit from custom tuning to maximize gains.

Previous article What is an EGR Valve? The Complete Guide to Function and Maintenance
Next article 6.7 Cummins Tuner with Deletes: Complete Guide to Performance & Risks

Leave a comment

* Required fields

Featured collection

  • Seguler 1986-1995 Ford F150 F250 F350 Mustang Trucks EGR Simulator Eliminator / Block Off Plate Kit

    SEGULER
    $78.58 - $78.58
    $78.58
    $78.58 - $78.58
    $78.58

    Block Off Plate Material: Aluminum alloy. Easy installation,and convenient to use. Made of CNC milled from aircraft grade Billet aluminum. Will N...

    View full details
    $78.58 - $78.58
    $78.58
    $78.58 - $78.58
    $78.58

  • Seguler 2009-2019 6.7L Ram Cummins Coolant Bypass Barb Adapter Leak Repair Kit

    SEGULER
    $35.99 - $35.99
    $35.99
    $35.99 - $35.99
    $35.99

    Made of aerospace-grade billet aluminum. Effectively repair the problem of coolant leakage. Resist corrosion and rust for a long time and has good...

    View full details
    $35.99 - $35.99
    $35.99
    $35.99 - $35.99
    $35.99

  • For 1996-2004 3.8L 4.6L 5.4L Ford GT SVT GT500 V8 Mustang Cobra EGR Delete kit And Exhaust Cap

    SEGULER
    $51.99 - $51.99
    $51.99
    $51.99 - $51.99
    $51.99

    Placement on Vehicle:Front Billet aluminum IAC (idle air control) and EGR (exhaust gas recirculation) block-off plates add a distinctive touch to ...

    View full details
    $51.99 - $51.99
    $51.99
    $51.99 - $51.99
    $51.99

  • For 2004-2005 6.6L Chevy GMC Silverado LLY Duramax Diesel EGR Delete Kit

    SEGULER
    $92.99 - $92.99
    $92.99
    $92.99 - $92.99
    $92.99

    Material: Aluminum,Stainless steel,Silicone Eliminates soot build-up and clogged EGR Valves Direct replacement. No installation instruction. No Gl...

    View full details
    $92.99 - $92.99
    $92.99
    $92.99 - $92.99
    $92.99

  • For 2011-2016 6.6L GMC Chevy Duramax Diesel LML EGR Valve Cooler Delete Kit

    SEGULER
    $66.49 - $66.49
    $66.49
    $66.49 - $66.49
    $66.49

    Material: Stainless steel, billet aluminum. Eliminate soot and block of EGR valve prevent high EGT from flow back into engine. Quicker turbo spoo...

    View full details
    $66.49 - $66.49
    $66.49
    $66.49 - $66.49
    $66.49

  • For 2011-2019 6.7L Ford Powerstroke Diesel EGR Delete Kit

    SEGULER
    $109.99 - $109.99
    $109.99
    $109.99 - $109.99
    $109.99

    Material: Aluminum alloy,Stainless steel. Exhaust cover plates for EGT probes in Ford factories. CNC machine of billet aluminum and stainless stee...

    View full details
    $109.99 - $109.99
    $109.99
    $109.99 - $109.99
    $109.99

  • For 2010-Present Stage 2 ISX 15 CM2250 CM2350 EGR Delete Kit

    SEGULER
    $59.99 - $59.99
    $59.99
    $59.99 - $59.99
    $59.99

    Material: Aluminum Two plates in this kit are made of 6061 aircraft grade billet aluminum anodized and CNC laser cut or CNC machined out of high q...

    View full details
    $59.99 - $59.99
    $59.99
    $59.99 - $59.99
    $59.99

  • For 2006-2007 6.6L Chevrolet Silverado Classic GMC Duramax LBZ Diesel EGR Valve Cooler Delete Kit

    SEGULER
    $63.49 - $63.49
    $63.49
    $63.49 - $63.49
    $63.49

    Material: Aluminum,Stainless steel,Silicone Eliminates soot build-up and clogged EGR Valves Guaranteed to last under high temperatures and pressu...

    View full details
    $63.49 - $63.49
    $63.49
    $63.49 - $63.49
    $63.49

  • For 2011-2023 6.7L Ford Powerstroke Diesel EGR Delete Kit

    SEGULER
    $85.99 - $85.99
    $85.99
    $85.99 - $85.99
    $85.99

    Material: Aluminum alloy,Stainless steel. CNC machine of billet aluminum and stainless steel more durable. Exhaust cover plates for EGT probes in ...

    View full details
    $85.99 - $85.99
    $85.99
    $85.99 - $85.99
    $85.99

  • For 2014-2019 3.0L Dodge Ram 1500 EcoDiesel EGR Valve & Cooler Delete Kit

    SEGULER
    $72.99 - $72.99
    $72.99
    $72.99 - $72.99
    $72.99

    Material: Aluminum,Stainless steel,Silicone. Eliminates soot build-up and clogged EGR Valves. EGR removed and the temperature in the engine compa...

    View full details
    $72.99 - $72.99
    $72.99
    $72.99 - $72.99
    $72.99

  • Seguler 2003-2007 6.0L FORD Powerstroke Diesel EGR Cooler Delete Kit

    SEGULER
    $56.14 - $56.14
    $56.14
    $56.14 - $56.14
    $56.14

    Material: 304 stainless steel,Aluminum billet. Eliminate ash accumulation and EGR valve blockage. Improve the cooling effect and reduce the engi...

    View full details
    $56.14 - $56.14
    $56.14
    $56.14 - $56.14
    $56.14

  • For 1983-1997 Ford F150 F250 F350 Mustang Trucks EGR Delete Block Off Plate Kit

    SEGULER
    $22.87 - $22.87
    $22.87
    $22.87 - $22.87
    $22.87

    Material: Aluminum alloy. Easy installation,and convenient to use. Made of CNC milled from aircraft grade Billet aluminum. Will Not Warp or Deform...

    View full details
    $22.87 - $22.87
    $22.87
    $22.87 - $22.87
    $22.87

  • Seguler 2003-2007 6.0L Ford F250 F350 Powerstroke Diesel EGR Basic Cooler Kit

    SEGULER
    $79.99 - $79.99
    $79.99
    $79.99 - $79.99
    $79.99

    CNC machine of Aluminum and Stainless Steel billets. Resist corrosion and rust for a long time and has good heat dissipation. Reduce component a...

    View full details
    $79.99 - $79.99
    $79.99
    $79.99 - $79.99
    $79.99

  • Seguler 2011-2016 6.6L GMC Chevy Duramax Diesel LML Up-Pipe & EGR Valve Cooler Delete Kit

    SEGULER
    $163.86 - $163.86
    $163.86
    $163.86 - $163.86
    $163.86

    Material: 304 Stainless Steel. Reduce the amount of carbon deposited from exhaust to intake. Thanks to its fast airflow and superior engineered ex...

    View full details
    $163.86 - $163.86
    $163.86
    $163.86 - $163.86
    $163.86

  • For 2011-2023 6.7L Ford F250 F350 F450 F550 Powerstroke Diesel EGR Valve Delete Cooler Delete Kit

    SEGULER
    $55.99 - $55.99
    $55.99
    $55.99 - $55.99
    $55.99

    Material: Aluminum alloy,Stainless steel. Black Anodized components for better durability. Exhaust Cover Plate Tapped for Ford Factory EGT Prob...

    View full details
    $55.99 - $55.99
    $55.99
    $55.99 - $55.99
    $55.99

  • For 2017-2023 6.6L Chevy GMC Duramax L5P diesel EGR Valve Cooler Delete kit

    SEGULER
    $131.99 - $131.99
    $131.99
    $131.99 - $131.99
    $131.99

    Material:Aluminum Alloy ,Stainless steel,Silica gel Improved Performance: Eliminating the EGR system leads to better exhaust flow and faster tur...

    View full details
    $131.99 - $131.99
    $131.99
    $131.99 - $131.99
    $131.99

  • Seguler 2010-2024 6.7L Dodge Ram Cummins Diesel EGR Valve Cooler Delete Kit

    SEGULER
    $89.99 - $89.99
    $89.99
    $89.99 - $89.99
    $89.99

    Material: Aluminum alloy,silicone This kit is intended for off road use. Eliminates soot build up and clogged EGR Valves. Hot exhaust gasses ar...

    View full details
    $89.99 - $89.99
    $89.99
    $89.99 - $89.99
    $89.99

  • Seguler 2017-2019 L5P Duramax Diesel 4pcs L5P Can Bus Plugs Connector Replacement

    SEGULER
    $59.99 - $59.99
    $59.99
    $59.99 - $59.99
    $59.99

    Material: ABS For use with an Aftermarket Exhaust System. A new engine calibration is required. Plugs will replace NOX and DEF modules. The L...

    View full details
    $59.99 - $59.99
    $59.99
    $59.99 - $59.99
    $59.99

  • For 11-23 Ford 6.7L Powerstroke CCV/PCV Reroute/Delete Engine Ventilation Kit

    SEGULER
    $72.00 - $72.00
    $72.00
    $72.00 - $72.00
    $72.00

    Material:Aluminum alloy rubber. Black Anodized components for better durability. This Crankcase Ventilation System provides a SOLID solution to ...

    View full details
    $72.00 - $72.00
    $72.00
    $72.00 - $72.00
    $72.00

  • For 2007-2010 Cummins ISX CM871 EGR Plug Kit Stage 2 Plates and Plugs Aluminum

    SEGULER
    $67.99 - $67.99
    $67.99
    $67.99 - $67.99
    $67.99

    Material:304 Stainless Steel & Billet Aluminum. High-temperature graphite gaskets are adopted to prevent leakage. Used to delete the EGR val...

    View full details
    $67.99 - $67.99
    $67.99
    $67.99 - $67.99
    $67.99

  • Seguler 2020-2023 chevy duramax L5P Diesel Can Bus Plugs Connector

    SEGULER
    $69.99 - $69.99
    $69.99
    $69.99 - $69.99
    $69.99

    For use with aftermarket exhaust systems or delete pipes Used when removing the DPF/DEF systems These plugs will go in place of the NOx and DEF mo...

    View full details
    $69.99 - $69.99
    $69.99
    $69.99 - $69.99
    $69.99

  • For 2007-2010 6.6L Chevy GMC LMM Duramax EGR Valve Cooler Delete Kit Fit

    SEGULER
    $61.99 - $61.99
    $61.99
    $61.99 - $61.99
    $61.99

    Material: Aluminum alloy,Stainless steel. Improves engine life by eliminating soot build-up and reducing fuel consumption. EGR valve cooler delet...

    View full details
    $61.99 - $61.99
    $61.99
    $61.99 - $61.99
    $61.99

  • Seguler 3" Ecodiesel DPF Delete Pipe & EGR Delete kit for 2014-2018 3.0L Ram

    SEGULER
    $342.00 - $342.00
    $342.00
    $342.00 - $342.00
    $342.00

    Material: High quality stainless steel Inlet Diameter: 3.0" Eliminates soot build-up and clogged EGR Valves Specialized designs to ensure a perfec...

    View full details
    $342.00 - $342.00
    $342.00
    $342.00 - $342.00
    $342.00

  • For 1986-1995 2.8L 4.9L 5.0L 5.8L 7.5L Ford F150 F250 Bronco EGR Simulator Eliminator Delete/EGR Delete

    SEGULER
    $59.99 - $59.99
    $59.99
    $59.99 - $59.99
    $59.99

    isconnect your stock EGR valve and breathe life into your motor, while keeping your check engine light off, but active for future problems! This ...

    View full details
    $59.99 - $59.99
    $59.99
    $59.99 - $59.99
    $59.99

  • For 2013-2023 6.7L Dodge Ram Cummins Cab & Chassis EGR Delete Kit Diesel

    SEGULER
    $62.99 - $62.99
    $62.99
    $62.99 - $62.99
    $62.99

    Material: Aluminum alloy. Eliminates soot build up and clogged EGR Valves. Hot exhaust gasses are not being re-routed back into the motor. Coo...

    View full details
    $62.99 - $62.99
    $62.99
    $62.99 - $62.99
    $62.99