Remote ECU tune · 6.4L HEMI V8 (392)
A custom Stage 1, 2 or 3 calibration for your RAM 2500/3500 6.4 HEMI, built by hand by a real tuner from your own stock file and datalog, and back with you within three hours of the file arriving. We tune these cars remotely, worldwide: you read and flash with your own HP Tuners interface, and you pay only once the tune is delivered.
Stock vs tuned
From the factory the RAM 2500/3500 6.4 HEMI makes 410 hp and 429 lb-ft (582 Nm). A Stage 1 tune typically adds 15–25 hp and 15–33 lb-ft, for around 425–435 hp in total. With bolt-ons and a Stage 2 calibration that grows to +30–50 hp, and a Stage 3 build — adding a supercharger or other forced induction, with the fuelling to support it — typically lands at 540–560 hp.
| Stage | Added power | Added torque | Total power | Total torque |
|---|---|---|---|---|
| Stock | — | — | 410 hp | 429 lb-ft (582 Nm) |
| Stage 1 | +15–25 hp | +15–33 lb-ft (+20–45 Nm) | 425–435 hp | 444–462 lb-ft (602–627 Nm) |
| Stage 2 | +30–50 hp | +30–48 lb-ft (+40–65 Nm) | 440–460 hp | 459–477 lb-ft (622–647 Nm) |
| Stage 3 | +130–150 hp | +96–133 lb-ft (+130–180 Nm) | 540–560 hp | 525–562 lb-ft (712–762 Nm) |
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Tuner's notes
The heavy-duty 6.4 is calibrated for towing and has less timing headroom than the car version, so tune-only gains are modest. Most of the gain shows above 4,000 rpm.
Supported versions
HP Tuners lists 4 RAM 2500/3500 6.4 HEMI entries covering 2011–2024, with 5.7 and 6.4-litre engines. Interface: MPVI2 or newer.
| Years | Model / engine as HP Tuners lists it | Controller | Credits | Interface |
|---|---|---|---|---|
| 2011–2014 | RAM 2500/3500 5.7, 6.4 | Engine | 2 | MPVI2/2+/3/4 |
| 2015–2017 | RAM 2500/3500 5.7, 6.4 | Engine | 2 | MPVI2/2+/3/4 |
| 2018 | RAM 2500/3500 5.7, 6.4 | Engine | 2 | MPVI2/2+/3/4 |
| 2019–2024 | RAM 2500/3500 6.4 | Engine | 2 | MPVI2/2+/3/4 |
Support data per HP Tuners' supported-vehicle list (June 2026). Check your exact car on HP Tuners' vehicle list before you buy credits.
Stages & prices
One flat price per stage, the same for every car: $250 for Stage 1, $450 for Stage 2 and $650 for Stage 3. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order. Gearbox (TCM) shift tuning is included wherever your car's transmission controller can be accessed.
Software only. Every map in the engine ECM is recalibrated for the RAM 2500/3500 6.4 HEMI as it sits today — spark, fuelling, throttle response and limiters — against the datalog you send.
For a RAM 2500/3500 6.4 HEMI with bolt-ons fitted — intake, exhaust, headers or downpipe, and an intercooler where the car has one. The airflow and fuelling are rebuilt around the hardware you actually have.
Stage 3 on the RAM 2500/3500 6.4 HEMI means adding a supercharger or other forced induction, with the fuelling to support it. The fuel, spark and boost maps are written from scratch for your exact combination.
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Before you order
How it works
FAQ
Typically 15–25 hp and 15–33 lb-ft (20–45 Nm) over the stock 410 hp, for around 425–435 hp in total. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
An HP Tuners interface (we recommend the MPVI4), the HP Tuners credits needed to license the engine ECM for writing, and your stock file plus a datalog of a drive. You read and flash the car yourself; we build the calibration.
Your custom tune is delivered within three hours of your stock file arriving. Six tuners work three shifts, so a file that lands in the middle of the night is picked up just as fast.
Stage 1 is $250, Stage 2 is $450 and Stage 3 is $650, flat. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order.
Stage 3 on the RAM 2500/3500 6.4 HEMI means adding a supercharger or other forced induction, with the fuelling to support it. The maps are written from scratch for your build, and typical results are 130–150 hp over stock. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
