Description
Jeep Grand Cherokee SRT 6.4L HP Tuners Stage 2 Custom Remote Tune — Heads, Cam & Stroker
A fully custom HP Tuners calibration for your Jeep Grand Cherokee SRT 6.4L 6.4L 392 HEMI V8, written by N2 Speed for naturally aspirated builds running heads, a camshaft package or a stroker motor. This is not a canned file: we build the calibration around your VIN, your modification list and the fuel you actually run, then refine it from your data logs.
Who This Stage 2 Tune Is For
Stage 2 suits naturally aspirated builds running heads, a camshaft package or a stroker motor. If your build sits between two stages, email your mod list to sales@n2speed.com before ordering and we will tell you which package to buy.
Expected Gains
Typical results: 70-120 hp with a cam package or stroker build. Gains vary with modifications, fuel quality, altitude and ambient temperature. We calibrate for reliable, repeatable power — not a dyno number you cannot drive.
What We Tune
- 392 spark and fuel calibration, mds strategy, torque limits, launch control, drive-mode mapping and zf8hp shift firmness
- Wide-open-throttle and part-throttle fueling
- Ignition timing with knock-safe margins for your fuel
- Throttle mapping and torque management limits
- Transmission shift points, firmness and torque limiting where applicable
- Optional MDS removal, speed limiter removal and drive mode tweaks
Vehicle Fitment
2012-2021 Jeep Grand Cherokee SRT 6.4L 392 HEMI (WK2). 2015 and newer SRTs have a locked PCM and need our mail-in unlock service first — send your VIN and we will confirm which route your Jeep needs.
HP Tuners Credits This Vehicle Needs
Total Credits Needed
Credits are how HP Tuners licenses each vehicle. They load onto your MPVI4 and are spent once, the first time the module is read. Adding transmission tuning means a second module is licensed, so the credit total goes up — the options above already include both.
- Engine Only — 2012-2021: 2 Universal Credits
- Engine and Transmission — 2014-2021 ZF8HP 8-speed: 6 Universal Credits
Credit requirements are set by HP Tuners and can change with model year. If your Jeep is not listed exactly, send your VIN to sales@n2speed.com and we will confirm before you buy anything.
What You Need
- HP Tuners MPVI4 with Pro Feature Set or another HP Tuners interface, plus credits for your vehicle
- Windows laptop with HP Tuners VCM Suite installed
- Ability to record and send data logs
- Wideband air/fuel gauge — recommended for this stage
What's Included
- One custom calibration built for your 6.4L 392 HEMI V8 and modification list
- Revisions after log review until the vehicle is running correctly
- Direct email support with the tuner who wrote your file
- Turnaround: first file normally within 1-2 business days
Revision turnaround: Revisions are done in the order they are received during business hours. Set time frames are available with notice. After-hours and weekend revisions are done when available.
Locked PCM?
Stellantis locks the PCM on 2015 and newer vehicles. If your Jeep cannot be written through the OBD-II port, we offer a mail-in Dodge, RAM & Jeep PCM unlock service and Jeep PCM bench tuning service. Send your VIN to sales@n2speed.com and we will confirm before you buy.
Questions? Call (954) 406-8550 or email sales@n2speed.com. N2 Speed — Pompano Beach, Florida.
Warranty Information
