The short version is simple: “Cab & Chassis” is a fitment rule, not a trim name. A flatbed does not prove the truck left the factory as a Cab & Chassis model. Start with the VIN or factory build record. Then look under the truck. An upfitter may have added a toolbox, tank, hitch, step, PTO, or hydraulic line where the new exhaust needs to run.
Will the Kit Fit Your Ram?
Use the table below as the first filter. It is meant to stop the most common mistake: buying a 2500/3500 pickup kit for a commercial chassis truck.
| Check | Required match | Stop if you find this |
|---|---|---|
| Model year | 2013–2018 | A year outside this range |
| Truck | Ram 3500, 4500, or 5500 | Ram 2500 |
| Engine | 6.7L Cummins diesel | Any other engine |
| Factory body type | Cab & Chassis | A finished pickup with a factory bed |
| Use | A use that follows all laws that apply | A road vehicle that must keep its factory emissions controls |
If all four vehicle fields match and the planned use is lawful, review the part listing and its current options. If one vehicle check fails, do not try to make the part fit. Use the correct listing for that truck.
How to Prove It Is a Cab & Chassis Truck
The rear body can fool you. A pickup bed can be removed and replaced with a flatbed. A true Cab & Chassis truck can also wear a body that looks almost factory. The badge will not settle it.
- Check the VIN and factory build record. Look for the Cab & Chassis body type. A dealer parts counter can also check the VIN.
- Record the full model. The fitment covered here is for the 3500, 4500, and 5500 Cab & Chassis. It does not cover the 2500.
- Measure the truck as it sits now. Note the wheelbase and cab-to-axle length. Check the tailpipe exit and every tight point near the frame.
- Inspect the upfit. Look for added tanks, toolboxes, crossmembers, hydraulic gear, PTO parts, steps, and hitch braces.
- Compare the live listing. Product options can change. Match the selected exhaust size, material, and start point before you pay.
This is the part that matters on a work truck: catalog fitment covers the base chassis, but it cannot see every body-builder change. A pipe can match the engine and year yet still hit a service-body brace. Check the whole route, not only the front flange.
Why a Pickup Kit Is the Wrong Shortcut
A Ram 3500 pickup and a Ram 3500 Cab & Chassis can share an engine and a badge. They may not share the same frame setup, wheelbase, tanks, hangers, or exhaust route. That is why DPFexhaust uses separate listings for pickup and Cab & Chassis trucks.
A wrong kit often shows itself late in the job. The front connection may look close, but a hanger, bend, or tail section can land in the wrong place. By then the stock system may already be apart. A five-minute VIN check is cheaper than finding that problem with the truck stuck on stands.
What “Delete Kit” Does and Does Not Tell You
The term “delete kit” has no fixed package list. One page may sell exhaust hardware only. Another may add EGR parts. A larger package may also include a tuner or other items. If the DPF, EGR, DEF, and SCR terms are not clear, use this 6.7L Cummins emissions-system guide before comparing packages.
For the hardware package discussed in this guide, the listed choices pair EGR hardware with one exhaust option. A tuner is not shown as part of those choices. Treat hardware fitment and tune support as two separate checks. Never pull factory parts first and hope the electronics can be sorted out later.
Pick the Correct Product Path
These four listings are not interchangeable. Two are for Cab & Chassis trucks, while two follow the standard pickup path. The links below are for fitment comparison in lawful off-road or competition applications. Read the live fitment notes before choosing any part.
Cab & Chassis: DPF and EGR Hardware
If your VIN confirms a 3500, 4500, or 5500 commercial chassis and you are checking a hardware package, compare the 6.7L Ram Cab & Chassis EGR/DPF delete kit. This is the Cab & Chassis route discussed in the fitment table. Do not assume that a tuner is part of the package.
[[product-recommend:1]]
Cab & Chassis: Complete Package
For a Cab & Chassis build that needs a matched package rather than hardware alone, review the complete 6.7L Cab & Chassis delete kit. Confirm the tuner, model year, control module, PTO needs, and exhaust option shown on the live page.
[[product-recommend:2]]
Standard Pickup: DPF and EGR Hardware
If the VIN shows a standard Ram 2500 or 3500 pickup, use the pickup path instead. The separate 6.7L Cummins EGR and DPF delete hardware page is the one to inspect. Do not use that pickup listing as proof that the same pipe fits a Cab & Chassis frame.
[[product-recommend:3]]
Standard Pickup: All-in-One Package
A pickup owner comparing a package with a tuner can review the 2013–2018 6.7L Cummins all-in-one delete kit. Its current fitment notes exclude Cab & Chassis trucks, so it is a comparison point—not a substitute—for the commercial-chassis package.
[[product-recommend:4]]
4-Inch or 5-Inch: Pick the Layout, Not Just the Number
The two listed choices are not the same system in two sizes. The 4-inch option is aluminized steel and downpipe-back. The 5-inch option is T-409 stainless and turbo-back. That changes the material, the amount of pipe replaced, the sound, and the space needed.
| Point | 4-inch option | 5-inch option |
|---|---|---|
| Material | Aluminized steel | T-409 stainless steel |
| Layout | Downpipe-back | Turbo-back |
| Practical concern | Takes less room around an upfit | Needs more clearance at bends and braces |
| Good reason to choose it | Simple routing and a mild work-truck setup | Stainless material, deeper tone, or a proven flow need |
On a truck that tows at one engine speed for hours, sound inside the cab matters more than a cold-start clip. A wide steel service body can reflect exhaust noise. A pipe that sits too close to a brace can also knock when the frame moves. The full 4-inch vs 5-inch Cab & Chassis exhaust comparison covers those tradeoffs.
Do not expect a set power gain from pipe size alone. If a 4-inch system already flows enough for the truck, a 5-inch pipe may change the tone more than the power. Buy for the truck’s real setup, load, climate, and space.
A Better Order of Operations
- Confirm legal use first. Do not buy first and ask about the law later.
- Decode the truck. Verify year, engine, model, and factory Cab & Chassis status.
- Inspect the full route. Check hangers, tanks, braces, driveline space, and the final exit.
- Choose the exhaust layout. Compare what each option replaces, not just 4 inches against 5 inches.
- Confirm tune support. Match the exact year and control setup before any stock hardware comes off.
- Open and count the parts. Do this while the truck still runs and the stock system is still in place.
U.S. Emissions and Road-Use Warning
Under the U.S. Clean Air Act, it is illegal to remove or disable required emissions controls on an EPA-certified motor vehicle. The law also bars parts made to bypass or defeat those controls. An “off-road” or “competition” label does not create an automatic exemption for a road-certified truck. The EPA explains the rule in its vehicle tampering and defeat-device fact sheet. State and local rules may add more limits. Check the law before you buy, install, or use any part.
Bottom Line
The best fitment check takes place before a wrench touches the truck. Verify that it is a 2013–2018 Ram 3500, 4500, or 5500 Cab & Chassis with a 6.7L Cummins. Then inspect the body upfit and exhaust route. If the VIN, layout, or legal use is unclear, stop and confirm it first.
If you still need to compare exhaust layouts, EGR hardware, complete packages, or related parts, browse the 2013–2018 6.7L Cummins performance parts collection. The collection includes both pickup and Cab & Chassis items, so check the fitment note on each product.
Frequently Asked Questions
Q: Does this fit a 2013 Ram 3500 Cab & Chassis?
A: The covered hardware is listed for a 2013 Ram 3500 Cab & Chassis with a 6.7L Cummins. Confirm the VIN, factory body type, exhaust route, and current product option before ordering.
Q: Does this fit a 2018 Ram 3500 Cab & Chassis?
A: A 2018 Ram 3500 is within the listed range when it is a factory Cab & Chassis truck with the 6.7L Cummins. Tune support is a separate check and must match the exact truck.
Q: Will a Cab & Chassis kit fit a standard Ram 3500 pickup?
A: Do not assume it will. The pickup and Cab & Chassis use separate listings because the frame setup and exhaust route can differ.
Q: Does the hardware package include a tuner?
A: A tuner is not shown in the listed options for the hardware package discussed here. Check the live product page and do not treat tuning as included unless the selected package says so.
Q: Why does a magnet stick to T-409 stainless steel?
A: T-409 stainless can be magnetic. It can also show light brown surface stains. Neither point proves that it is plain carbon steel.
Q: Is a delete kit legal on a street truck?
A: No, not when it removes or disables emissions controls required on an EPA-certified road vehicle. Check federal, state, and local law for the truck and its use.
