Table of Contents

What Changed on the 6.7 Cummins in 2013

The 6.7L Cummins has been in Ram heavy-duty trucks since the 2007.5 model year. The 2013 model year brought the biggest emissions hardware change of that run. Our 6.7 Cummins DPF and EGR delete guide covers the full 2007 to 2024 Ram run.

  • 2007.5 to 2012 pickups used EGR, a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and a NOx adsorber catalyst (NAC) to control NOx.
  • 2013 to 2018 pickups dropped the NAC and switched to selective catalytic reduction (SCR) with diesel exhaust fluid (DEF), while keeping EGR, DOC, and DPF.
Hardware 2007.5 to 2012 pickup 2013 to 2018 pickup
EGR valve and cooler Yes Yes
DOC Yes Yes
DPF Yes Yes
NOx adsorber catalyst (NAC) Yes No
SCR catalyst with DEF tank, pump, and injector No Yes
NOx sensors tied to SCR No Yes

How the Emissions System Works on This Generation

EGR (Exhaust Gas Recirculation): Sends cooled exhaust back into the intake to lower combustion temperatures and cut NOx.

DOC and DPF: The DOC oxidizes hydrocarbons and heats the exhaust. The DPF traps soot. When the filter fills, the truck runs an active regeneration: it adds fuel so exhaust temperatures rise high enough to burn off the soot. A plugged DPF brings warning lights and reduced power.

SCR and DEF: DEF is sprayed into the exhaust ahead of the SCR catalyst, which converts NOx into nitrogen and water. This adds a DEF tank, pump, injector, and NOx sensors to the truck. Low DEF level or certain system faults trigger warnings.

If your truck shows DPF or DEF warnings, have a diesel shop diagnose the cause before you replace parts or buy a kit.

What a Full Kit Includes for 2013 to 2018

A full setup for this generation covers the exhaust side, the EGR side, and calibration. Exact contents vary by product, so read the What's in the Box list on every listing before you check out. You can compare listings in the 6.7 Cummins delete kits collection.

  • DPF delete pipe: Replaces the factory DPF, DOC, and SCR assembly. Offered in 4-inch and 5-inch diameters, with or without a muffler. Check the listing for material (such as T409 stainless steel), clamps, hardware, and hanger fitment.
  • EGR delete kit: Block-off plates or cooler delete hardware, gaskets, and coolant hardware. Some 2013 to 2018 kits also include a throttle valve delete. Colors (black, silver, red) vary by kit.
  • Tuner: Removing emissions hardware may require tuning to address check-engine lights, diagnostic codes, or engine calibration. EngineGo's 2013 to 2017 all-in-one kits list the Mini Maxx V2 tuner. Confirm your model year is covered before ordering. Tuner products may have stricter return limitations than hard parts.
  • Optional add-ons: A CCV reroute kit is a common add-on for owners already working on the engine.

Buying a matched bundle cuts the risk of mixing parts with different year coverage. Our breakdown of all-in-one delete kits vs separate parts walks through when each option makes sense.

Fitment: Check These Before You Order

Model year

  • EngineGo lists parts for 2013 to 2018 trucks separately from parts for 2007.5 to 2012 trucks. Order the range that matches your truck.
  • Many all-in-one tuner kits list 2013 to 2017 coverage. If you own a 2018, confirm tuner support before you order or send us your truck details.
  • 2019 and newer Ram HD trucks use a new body style. Do not cross-shop 2019 listings for a 2018 truck.

Pickup vs Cab & Chassis

Important: Standard Ram 2500 and 3500 pickup parts are not compatible with Ram 3500, 4500, or 5500 Cab & Chassis trucks.

A Cab & Chassis truck is a separate platform built for upfits like flatbeds and service bodies, with different frame and exhaust routing. Ram added SCR and DEF to its 3500, 4500, and 5500 Chassis Cab trucks in the 2011 model year, two model years before the pickups. EngineGo lists dedicated EGR kits for 2013 to 2024 Ram 3500, 4500, and 5500 Cab & Chassis trucks. Check the listing title for "Cab Chassis" before you order.

Cab, bed, and configuration

Tailpipe exit and hanger position depend on cab style and bed length. Our guide to cab and bed configuration and delete pipe fitment shows what to measure and what to send support if your truck is not stock.

Transmission

Your transmission matters as much as your engine badge, because it affects how much added torque the drivetrain can handle.

Transmission Found on 2013 factory rating
G56 6-speed manual Ram 2500 and 3500 350 hp, 660 lb-ft
68RFE 6-speed automatic Ram 2500 and standard-output Ram 3500 370 hp, 800 lb-ft
Aisin AS69RC 6-speed automatic High-output Ram 3500 only 385 hp, 850 lb-ft

The table shows 2013 ratings. Engine ratings and transmission pairings changed in later model years, so confirm your own truck's configuration. Check the window sticker or ask a Ram dealer to decode your VIN.

Raising power adds load to the transmission. Ask a transmission shop about the limits of your transmission before you choose a tune level, especially if you tow. Slipping between shifts, shuddering under load, or RPM flare are signs to stop and have it inspected. If you tow, read our best 6.7 Cummins upgrades for towing to plan the rest of the build.

4-Inch vs 5-Inch Pipe

The two sizes differ in sound, clearance under the truck, and price. Our 4-inch vs 5-inch delete pipe comparison covers sound, fitment, and how to choose for towing, daily driving, or off-road use.

What to Expect

Results depend on tune quality, truck condition, and how you use the truck. EngineGo does not promise specific horsepower, torque, fuel economy, or temperature figures. The change you will notice for certain is more exhaust sound, especially without a muffler.

Plan for these as well:

  • Inspection. Many states inspect emissions equipment and the on-board diagnostic system. A truck with missing equipment can fail inspection or registration.
  • Keep your factory parts. Store the DPF, DOC, SCR assembly, EGR components, and sensors in case you need to return the truck to stock.

Installation Difficulty

Check the installation difficulty listed on each product page. Professional installation is recommended if you are not comfortable with exhaust, cooling system, or electronics work. Our guide on how to delete a 2013 to 2017 6.7 Cummins walks through the job.

  • Use a lift or rated jack stands. Never work under a truck held up only by a jack.
  • Let the exhaust cool fully before you start.
  • Soak exhaust bolts with penetrating oil ahead of time. Rusted hardware is common on older trucks.
  • Wear safety glasses and heat-resistant gloves.

Federal and State Rules

  • The Clean Air Act prohibits removing or disabling emissions controls on certified road vehicles. It also prohibits selling or installing parts whose principal effect is to defeat those controls. Civil penalties are assessed per vehicle or per device and are adjusted for inflation each year.
  • A label or buyer waiver that says "off-road use only" does not change how a certified vehicle is treated.
  • On January 21, 2026, the U.S. Department of Justice said it would no longer pursue criminal charges under the Clean Air Act for tampering with onboard diagnostic systems in motor vehicles. The law did not change, and the department said it will still pursue civil enforcement when appropriate.
  • States run their own inspection programs and can refuse registration to a truck with missing equipment.

These products are not intended for use on emissions-controlled vehicles on public roads unless legally permitted. Check federal, state, and local laws before purchase.

FAQs

Do I need a tuner for a 2013 to 2018 6.7 Cummins kit?

Removing emissions hardware may require tuning to address check-engine lights, diagnostic codes, or engine calibration. Confirm your exact model year is covered, and review tuner return limitations before ordering.

Will a pipe listed for 2007.5 to 2012 fit my 2013?

Order parts listed for 2013 to 2018. EngineGo lists the two year ranges separately, and the Vehicle Fit Guide on each product page shows what fits.

Will a pickup part fit my Cab & Chassis truck?

No. Cab & Chassis trucks need parts listed specifically for Cab & Chassis.

Can I use these parts on a truck I drive on public roads?

These products are intended only for off-road, race, or non-public-road use where permitted. You are responsible for confirming legal compliance.

How fast will it ship?

Most orders are processed the same or next business day, excluding Sundays, unless otherwise stated. Most packages are delivered within 3 to 5 business days after leaving the warehouse, depending on package size, location, and carrier conditions. Free shipping applies to orders shipped within the continental United States.

What if it doesn't fit?

EngineGo accepts authorized returns within 45 calendar days from the date the product is received, unless otherwise specified. Returned items must be unused, uninstalled, unmodified, and in original condition with all included components. Tuner products and bundles that include a tuner may have stricter return limitations.

Find the Right Parts for Your Truck

Browse parts listed for your generation in the 6.7L Ram Cummins 2013 to 2018 collection, and use the Vehicle Fit Guide on each product page before checkout.

Not sure which kit fits? Send us your year, cab style, bed length, transmission, whether the truck is a pickup or Cab & Chassis, any prior modifications, and how you use the truck. EngineGo support will help confirm fitment before you buy.