Remote ECU tune · 6.4L HEMI V8 (392)
A custom Stage 1, 2 or 3 calibration for your Jeep Grand Cherokee SRT 6.4 (WK2), 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 Jeep Grand Cherokee SRT 6.4 (WK2) makes 475 hp and 470 lb-ft (637 Nm). A Stage 1 tune typically adds 15–25 hp and 15–26 lb-ft, for around 490–500 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 605–675 hp.
| Stage | Added power | Added torque | Total power | Total torque |
|---|---|---|---|---|
| Stock | — | — | 475 hp | 470 lb-ft (637 Nm) |
| Stage 1 | +15–25 hp | +15–26 lb-ft (+20–35 Nm) | 490–500 hp | 485–496 lb-ft (657–672 Nm) |
| Stage 2 | +30–50 hp | +30–44 lb-ft (+40–60 Nm) | 505–525 hp | 499–514 lb-ft (677–697 Nm) |
| Stage 3 | +130–200 hp | +74–148 lb-ft (+100–200 Nm) | 605–675 hp | 544–617 lb-ft (737–837 Nm) |
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Tuner's notes
Same 392 HEMI as the Charger/Challenger Scat Pack, in a heavier AWD SUV.
Supported versions
HP Tuners lists 1 Jeep Grand Cherokee SRT 6.4 (WK2) entry covering 2005–2021, with 3.6, 3.7, 4.7, 5.7, 6.1 and 6.4-litre engines. Interface: MPVI2 or newer.
| Years | Model / engine as HP Tuners lists it | Controller | Credits | Interface |
|---|---|---|---|---|
| 2005–2021 | Grand Cherokee 3.6, 3.7, 4.7, 5.7, 6.1, 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 Jeep Grand Cherokee SRT 6.4 (WK2) as it sits today — spark, fuelling, throttle response and limiters — against the datalog you send.
For a Jeep Grand Cherokee SRT 6.4 (WK2) 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 Jeep Grand Cherokee SRT 6.4 (WK2) 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 15–26 lb-ft (20–35 Nm) over the stock 475 hp, for around 490–500 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 Jeep Grand Cherokee SRT 6.4 (WK2) 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 130–200 hp over stock. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
