Factory-location VGT replacement turbos with a new pre-matched actuator, for 2007.5-2024 Ram 6.7L Cummins and Cummins ISX15 / X15 trucks.
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Diesel Power Source® HE-series turbos are variable geometry (VGT) replacements that bolt into the factory location and keep factory VGT functions, including the exhaust brake. For the 2007.5-2024 Ram 6.7L Cummins, the DPS HE300VG replacement turbo is built on the HE-series platform in three compressor sizes and ships with a brand-new pre-calibrated electronic actuator. For the Cummins ISX15 / X15, DPS offers HE400VG and HE451VE replacement turbos matched to the two factory turbo families, plus turbo and manifold packages for both platforms.
Bolts in where the factory VGT turbo came out
Pre-calibrated and matched to the turbo on 6.7L replacements
Factory exhaust brake and engine brake function stay intact
63mm and 66mm for the 6.7L, 70mm for the ISX15 / X15
The factory turbo controls boost with movable vanes driven by an electronic actuator. Over time, carbon buildup on the vanes, actuator wear, and oil coking cause Stuck Turbo Syndrome, the most common turbo problem on the 6.7L Cummins. Early signs include an exhaust brake that works intermittently, sluggish or erratic boost, and actuator codes such as P003A, P2262, P226C, P00AF, and P0299.
A sticking vane assembly overloads and destroys the actuator, and a weak actuator lets the vanes sit in one position and load up with carbon. Replacing only one part often leads to a repeat failure. Every DPS HE300VG replacement turbo ships with a brand-new pre-calibrated electronic actuator matched to the turbo, so no calibration is needed after installation.
DPS supplies the HE300VG to replace both factory turbos. There is no downside to replacing an HE351VE with the HE300VG, and 2007.5-2012 replacements include a pigtail that plugs into the factory harness. Select your model year at checkout and DPS configures the correct turbo and actuator for your truck.
The HE363VG and HE366VG use DPS-modified compressor wheels and a larger turbine wheel. Each 1mm of compressor wheel adds roughly 10 RWHP and lowers EGTs. The HE363VG typically adds about 30-40 HP over the factory-size unit, and both larger sizes run with more headroom than stock.
| Turbo | Compressor Wheel | HP Range (RWHP) | Best For |
|---|---|---|---|
| HE360VG | 60mm | Stock-400 | Factory-size replacement with factory drivability |
| HE363VG | 63mm | Stock-550 | Towing and daily driving with lower EGTs and more headroom |
| HE366VG | 66mm | 425-650 | The largest HE-series option, for performance builds that keep factory fitment |
HP figures are approximate rear wheel horsepower and vary with tuning, fueling, and supporting modifications. All three sizes keep the factory exhaust brake, EGR compatibility, and emissions equipment.
Mid/late 2016-2025 X15 trucks use the HE400VG. Mid/late 2016 and older ISX15 trucks, including CM871, use the HE451VE. The two are not interchangeable, and the 2016 model year can go either way. Your engine serial number (ESN) decides which turbo your truck takes.
The factory HE400VG uses a 64mm wheel on the lowest-rated trucks and a 67mm wheel on the rest. The DPS HE470VG uses a 70mm wheel, which exceeds the largest factory option with the same housing, mounting, and actuator fitment.
Actuator-only repairs on the X15 often lead to turbo failure shortly after. DPS supplies the HE400VG with a new matched actuator to break that cycle, and engine brake function is preserved.
The DPS HE400VG fits ISX15 / X15 trucks in Freightliner, Peterbilt, Kenworth, Volvo, International, and Western Star chassis. Verify your ESN with DPS before ordering.
More options: Need more airflow than the HE-series? See Turbonator® VGT upgrades or all 6.7 Cummins turbo options. For semi trucks, see ISX15 / X15 turbo and manifold upgrades. Free shipping on orders over $350.
Cummins is a registered trademark of Cummins Inc. Diesel Power Source® is not affiliated with Cummins Inc.
VGT = Variable Geometry Turbo. It has movable vanes inside the turbine housing that adjust based on engine load and RPM.
How VGT works:
Fixed-geometry turbo (S300, S400):
Why VGT for 6.7L Cummins? Factory uses VGT for emissions control, engine braking, and drivability. Upgrading to HE300VG or HE400VG gives you more power while keeping those factory features intact.
Yes, typically 100-175°F cooler than stock when towing similar loads.
Why VGT upgrades help with EGTs:
Real-world example:
Compare to fixed-geometry turbos:
For many 6.7L Cummins owners, VGT upgrades offer the best balance: significant EGT improvement while keeping all factory functionality.
HE300VG (Smaller Frame):
HE400VG (Larger Frame):
Quick decision guide:
Yes. HE300VG and HE400VG VGT turbos are widely used in towing and street-driven diesel applications because they provide fast response at low RPM while still flowing enough air for higher boost under load. When properly sized and tuned, these VGT turbos deliver smooth drivability, strong midrange torque, and reliable performance for daily driving, towing, and performance builds.
Yes—this is one of the main advantages of VGT turbos.
HE300VG and HE400VG turbos are designed to work with factory emissions systems:
Important for emissions-regulated states:
Note: While VGTs work with emissions equipment, you'll need tuning that's calibrated for emissions-on operation. Work with tuners familiar with emissions-compliant tuning for best results.
HE300VG:
HE400VG:
Supporting mods needed for these power levels:
VGT turbos aren't designed for extreme horsepower (700+ HP). For those goals, see our S400 Single Turbos or Compound Systems.
