Spec reference · Cummins-powered vehicles · 1989–2026
Cummins specs for Ram, Titan XD, trucks, buses and RVs, on one board.
The four Ram pickup engines in depth, plus the Cummins families in the Nissan Titan XD, medium- and heavy-duty trucks, school and transit buses, motorhome chassis and fire apparatus. Specs, ratings, common issues in plain English and recalls checked against NHTSA. Every number is cited.
01Ram pickups: the four generations
5.9 12-valve
1989–1998
- Injection
- Bosch VE rotary (1989–1993); Bosch P7100 inline (1994–1998)
- Turbo
- Holset H1C; WH1C (1994); HX35W (1995–1998)
- Ratings
- 160 hp / 400 lb‑ft to 215 hp / 440 lb‑ft
5.9 24-valve
1998.5–2002
- Injection
- Bosch VP44 electronic rotary
- Turbo
- Holset HX35W / HY35W (wastegated)
- Ratings
- 215 hp / 420 lb‑ft to 245 hp / 505 lb‑ft
5.9 common-rail
2003–2007
- Injection
- Bosch high-pressure common rail, CP3 pump
- Turbo
- Holset HE341CW / HE351CW (wastegated)
- Ratings
- 235 hp / 460 lb‑ft to 325 hp / 610 lb‑ft
6.7
2007.5-present
- Injection
- Bosch high-pressure common rail (pump changes by year)
- Turbo
- Holset HE351VE / HE300VG (VGT)
- Ratings
- 350 hp / 610 lb‑ft to 430 hp / 1,075 lb‑ft
02Beyond Ram: engine families
Each family page has verified specs, rating ranges, the makes and models we could document, emissions eras, common issues and recall lookups. Prefer to start from the vehicle? Use By vehicle.
ISV5.0 V8
2016–2019
- Displacement
- 5.0 L
- Titan XD rating
- 310 hp / 555 lb‑ft
- Emissions
- DPF + SCR (DEF)
R2.8 / ISF2.8
2017-present (R2.8)
- Displacement
- 2.8 L (171 cu in)
- R2.8 rating
- 161 hp / 310 lb‑ft
- Emissions
- Cooled EGR + DOC, no SCR
ISB / B6.7 (commercial)
1998-present
- Displacement
- 5.9 L, then 6.7 L
- 2017-on ratings
- 200–325 hp / 520–750 lb‑ft
- Emissions
- EGR + DPF + SCR (2010-on)
ISC / ISL / L9
1998-present
- Displacement
- 8.3 L (ISC), 8.9 L (ISL / L9)
- 2024 L9 ratings
- 260–380 hp / 860–1,250 lb‑ft
- Emissions
- EGR + DPF + SCR (2010-on)
ISX / X15 / X12
1998-present
- Displacement
- 10.8 L (ISM), 11.9 L (ISX11.9/12), 15 L (ISX15/X15)
- X15 ratings
- 400–605 hp / 1,450–2,050 lb‑ft
- Emissions
- EGR + DPF + SCR (2010-on)
03Ram engines compared
Dodge/Ram 2500/3500 pickup applications. Details, conflicts between sources and year-by-year ratings are on each engine page. [1,2,3,4,5,6,7,8,9,10]
| Engine | Years | Displacement | Valves | Injection | Turbo family | Factory pickup ratings |
|---|---|---|---|---|---|---|
| 5.9 12-valve | 1989–1998 | 5.9 L / 359 ci | 12 (2 per cyl.) | Bosch VE rotary (1989–1993); Bosch P7100 inline (1994–1998) | Holset H1C; WH1C (1994); HX35W (1995–1998) | 160 hp / 400 lb‑ft to 215 hp / 440 lb‑ft |
| 5.9 24-valve | 1998.5–2002 | 5.9 L / 359 ci | 24 (4 per cyl.) | Bosch VP44 electronic rotary | Holset HX35W / HY35W (wastegated) | 215 hp / 420 lb‑ft to 245 hp / 505 lb‑ft |
| 5.9 common-rail | 2003–2007 | 5.9 L / 359 ci | 24 (4 per cyl.) | Bosch high-pressure common rail, CP3 pump | Holset HE341CW / HE351CW (wastegated) | 235 hp / 460 lb‑ft to 325 hp / 610 lb‑ft |
| 6.7 | 2007.5-present | 6.7 L / 408 ci | 24 (4 per cyl.) | Bosch high-pressure common rail (pump changes by year) | Holset HE351VE / HE300VG (VGT) | 350 hp / 610 lb‑ft to 430 hp / 1,075 lb‑ft |
Broader family comparison on the Engines page. All four share the 1-5-3-6-2-4 firing order and inline-six layout. The 5.9s share a 4.02 x 4.72 in bore and stroke; the 6.7 grows to 4.21 x 4.88 in.
By vehicle
Pickups, medium- and heavy-duty trucks, school and transit buses, RV chassis and fire apparatus, tied to their engine family.
IDWhich Cummins do I have?
For Ram trucks: model year, VIN decoding and under-hood cues. For everything else: the engine dataplate.
NHTSARecalls & service bulletins
Vehicle (VIN) vs. engine (equipment) recalls, how to search both on NHTSA, and the campaigns we verified.
A–ZGlossary
VP44, CP3, KDP, ESN, XPI, MidRange, DPF, SCR, DEF and more.
SRCSources
Accessed October 2026. Numbers in brackets throughout the page point here. Brand names are used descriptively.
- DrivingLine Cummins History, Lesson 1: '89-'93 5.9L
- DrivingLine Cummins History, Lesson 2: '94-'98 5.9L
- DrivingLine Cummins History, Lesson 3: '98.5-'02 5.9L
- DrivingLine Cummins History, Lesson 4: '03-'07 5.9L
- DrivingLine Cummins History, Lesson 5: '07.5-'18 6.7L
- Diesel Hub 5.9 Cummins 6BT Engine Info (12 Valve)
- Diesel Hub 5.9 Cummins ISB Engine Info (24 Valve)
- Diesel Hub 6.7 Cummins Turbodiesel Specs & Info
- Cummins Inc. Cummins Launches Next Generation 6.7L Turbo Diesel Pickup Engine System for 2025 Ram Heavy Duty Trucks (press release, Jan 7 2025)
- Stellantis North America Media What's New for 2026: Ram Heavy Duty