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5.9 24V Cummins | 1998.5 – 2002

Second Gen 24-Valve Cummins Parts (1998.5–2002)

Boost airflow, improve turbo response, and lower temps on your 1998.5–2002 Dodge Ram 5.9L 24V Cummins (VP44). Diesel Power Source turbos, exhaust manifolds, and install hardware are built for towing, work trucks, and balanced street builds—with clean fitment and durability.

This page highlights second-gen 24-valve upgrades and fit notes. If you need 12-valve or 6.7L parts, use the links below. Detailed specs, year breaks, and exact kit contents are listed on each product page.

Why upgrade your 1998.5–2002 24V Cummins

  • Stronger towing and midrange: Flow-optimized manifolds and right-sized turbos help hold speed on grades with lower EGT.
  • Quicker spool and response: Efficient collectors and clean hot-side routing improve low-rpm boost for street and tow manners.
  • Durability: Thick-wall castings and flat-machined flanges resist warping and leaks through repeated heat cycles.
  • Clean fitment: Components modeled around second-gen bay clearances for service access and repeatable installs.

What’s the recommended turbo setup for towing on a 24V

For heavy towing, a compound (S300 over S400) configuration delivers early spool, strong midrange, and cooler EGT on long pulls. DPS compound kits are engineered for 1998.5–2002 second-gen packaging, with piping and clearances matched to the chassis, making them a reliable tow solution from ’98.5 through ’02.

Benefits of a Turbonator® VGT on a 24V

A Turbonator® VGT exhaust housing can improve low-end response—often spooling ~200–300 rpm sooner—and supports exhaust braking for better downhill control. It lets you run a larger charger without giving up drivability at lower speeds, which is valuable for mixed street/tow use.

How to choose parts for a second-gen 24V

  • Towing & daily: Stock-replacement or T3 manifold with a quick-spooling S300-class turbo. Monitor EGT on first towing runs.
  • Street performance: Mid-size S300 or compact S400 with the correct turbine A/R to hold speed on grades without excessive lag.
  • Higher-fuel builds: Larger airflow with freer housings and adequate intercooling; plan converter, gearing, and brakes for target power.

Fitment checklist for 1998.5–2002

  • Confirm T3 vs T4/T4i manifold flange for your turbo choice.
  • Verify downpipe route, intercooler path, and clearance at steering shaft, heater box, and A/C lines.
  • Plan new gaskets, quality hardware, heat shielding, and sensor ports if logging EGT or drive pressure.

Install & first-drive notes

  • Use new gaskets and quality hardware; torque in sequence on a cold engine.
  • Pressure-test the charge-air system before first start; check for any pre-turbine leaks.
  • Monitor boost and EGT on shakedown; re-check fasteners after heat cycles if specified.

Shopping related categories? 5.9 Cummins Manifolds (12V, 24V, common-rail) | S300 Single Turbos | S400 Single Turbos | Add-A-Turbo (Compound-Over-Stock) Kits. For 12V parts see Second Gen 12V (1994–1998) or First Gen 12V (1989–1993).

FAQ's for 1998.5–2002 Dodge Cummins 24V

Diesel Power Source offers turbochargers, performance exhaust manifolds, turbo upgrade kits, airflow components, and supporting hardware designed specifically for 1998.5–2002 24V Cummins trucks.

We offer both direct replacement parts for worn or cracked factory components and performance upgrades designed to increase airflow, boost efficiency, and overall engine performance.

Many turbo upgrades and airflow improvements benefit from custom tuning to ensure proper fueling and safe operation. Tuning requirements vary by setup and are typically noted in the product description.

A performance turbo offers improved airflow efficiency, stronger boost control, and better performance under load compared to a factory turbo. This helps the engine make more usable power while keeping exhaust temperatures under control.

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