S300 single turbos, compound turbo kits, and high-flow exhaust manifolds for the 2003-2007 5.9L common rail Cummins - engineered by Diesel Power Source.
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The 3rd gen 5.9L common rail Cummins combines the legendary 5.9L engine block with modern high-pressure common rail fuel injection (Bosch CP3). This platform remains one of the most capable and tunable diesel engines ever built. The common rail system responds exceptionally well to tuning, and the higher factory output (305-335 HP) means the engine is already making real power before you add DPS turbo upgrades on top.
The factory HE351CW turbo (2004.5-2007) was a step up from the older HX35, but it still runs out of airflow on any truck with injectors and a quality tune. DPS S300 single turbos flow nearly double the air of the factory turbo, and our compound kits deliver the widest powerband and biggest EGT reductions available for the 5.9L platform. Whether you are towing heavy, building street performance, or going full competition, DPS builds the turbo system to match.
S362 through S369, journal and ball bearing
Singles and compounds both reduce exhaust temps under load
Designed for 2003-2007 Dodge Ram 2500/3500
Pre-EGR, pre-DPF platform - no factory restrictions
S362 or S363 single turbo or entry-level compound kit (S362/S475) + EFILive or handheld tuner + 4" exhaust. Quick spool, measurably cooler EGTs, excellent street manners.
S366 or S369 single or mid-range compound (S363/73 over S475-S480) + custom EFILive + injectors + built trans. Stronger midrange and top-end airflow. Ball bearing recommended on larger compressors.
Compound kits (S366 or S369 over S480) + dual CP3 pumps + big injectors + built trans. Plan supporting mods: head studs above 55 PSI boost, aftermarket rods near 800 RWHP.
Ready to upgrade? Browse 3rd Gen S300 Turbos, 3rd Gen Compound Kits, 3rd Gen Exhaust Manifold, or call 801-930-8404 for sizing help.
The 3rd gen Cummins years are 2003 through 2007, covering the Dodge Ram 2500 and 3500 trucks equipped with the 5.9L common rail diesel engine. This generation is identified by its switch from the earlier VP44 injection pump to a Bosch high-pressure common rail (HPCR) fuel system. The 3rd gen 5.9 Cummins engine produces between 305–325 hp and 555–610 lb-ft of torque from the factory depending on year and trim.
Common rail introduced high-pressure electronic fuel injection to the proven 5.9L platform.
Major improvements over earlier generations:
Common rail advantages:
Why 5.9L common rail is popular for modifications:
Turbo choice depends on power goals; common rail supports wide range.
For daily driving / moderate towing (400-500 HP):
For heavy towing / performance (500-650 HP):
For competition / high power (650-900+ HP):
Common rail specific advantages:
The 3rd gen Ram 2500 with the 5.9 Cummins engine is widely regarded as one of the strongest diesel performance platforms available. The common rail fuel system is highly responsive to tuning, and the 5.9L block has proven capable of over 1,000 hp in built applications. For most street or tow builds on a 3rd gen dodge Ram 2500, a turbo upgrade, performance exhaust manifold, and supporting fueling work deliver significant, reliable gains without compromising daily drivability. Use our turbo selector tool to find the right system for your power goals.
EGT improvements: 175-300°F depending on turbo configuration and power level.
Stock turbo baseline (with tuner added):
After S366 single turbo + 475 HP tuning:
After S472 or S475 single + 550 HP:
After compound turbos + 650-700 HP:
Why EGT control critical for common rail:
Safe EGT guidelines for 5.9 common rail:
Mid-2004.5 updates brought improvements; both platforms excellent for mods.
Early 2003-2004 (SO models):
Late 2004.5-2007 (HO models):
2007 emissions note:
Which is better for performance?
Recommendation: Either platform excellent. If buying, late 04.5-07 (pre-DPF) slightly better baseline. If you own early 03-04, no worries; upgrades to same power levels.
Generally reliable platform with a few known issues to address.
Fuel system considerations:
Transmission issues (48RE automatic):
Exhaust manifold cracking:
Grid heater issues:
Steering linkage wear:
Front axle U-joints (4WD):
Overall reliability: With proper maintenance and quality fuel, these engines run 300k-500k+ miles. The 5.9L block is legendary for durability, and common rail adds modern refinement.
Absolutely; common rail makes excellent daily driver at all power levels.
Why 5.9 common rail excels for daily use:
Daily driving by power level:
Mild (425-500 HP, S300 single, tuner):
Moderate (500-650 HP, larger turbo, injectors):
High performance (650-800+ HP, compounds, full build):
Real-world daily experience:
Both generations use the same 5.9L inline-six Cummins block, but the fuel system is completely different. The 2nd gen 5.9 Cummins (1998.5–2002) uses the Bosch VP44 rotary injection pump — a mechanical system with limited high-power headroom. The 3rd gen 5.9 Cummins (2003–2007) switched to a Bosch high-pressure common rail system with a CP3 injection pump and individual solenoid-controlled injectors, making the 3rd gen dodge 5.9 significantly more tunable and compatible with a wider range of turbo and fueling upgrades.
