Jeep Grand Cherokee 5.7 V8 326 hp — Stage 1 file

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Chip tuning for Jeep Grand Cherokee 5.7 V8 326 hp ECU

Jeep Grand Cherokee (2005 - WK) 5.7 V8 326 hp — mass-market petrol engine of the passenger segment of the Stellantis group (США, 1941). A petrol engine built in 2005 — the era before widespread firmware encryption, OBD flash without complications.

Trail Rated is Jeep's signature certification for off-road capability. The Jeep range comprises the Wrangler, Cherokee, Grand Cherokee, Compass, Renegade, Gladiator and Avenger. Jeep shares platforms and engines with Dodge, Chrysler and Ram. The Jeep Trackhawk is the flagship, powered by the Hellcat-family supercharged Hemi V8. Jeep's petrol range comprises the Pentastar V6, the Hemi V8 and turbo four-cylinders. On Hemi V8-powered Jeep models, Stage 1 delivers a confident gain.

In Europe the Jeep community is growing thanks to the diesel versions. The Jeep community in the US offers a large pool of ready-made Stage files for off-road use. High-output Jeep models are the top-spec Grand Cherokee and Wrangler, with solid headroom for Stage 1.

Frequently asked questions

What changes in the Jeep Grand Cherokee ECU after Stage 1?

Stage 1 is a software optimization of the factory ECU firmware of the Jeep Grand Cherokee with no hardware changes. The injection, boost, ignition-timing and torque maps are reprogrammed.

Do you need hardware changes for Stage 1 on the Jeep Grand Cherokee?

Stage 1 on the powerful Jeep Grand Cherokee 5.7 V8 326 hp “lifts” the factory limiters with no hardware changes. The gain is noticeable in the mid and upper range. There is headroom left for moving to Stage 2 (downpipe + intake + intercooler).

What is Stage 2 for the Jeep Grand Cherokee 5.7 V8 326 hp?

Stage 2 for the Jeep Grand Cherokee 5.7 V8 326 hp is Stage 1 plus hardware changes: a downpipe, a larger intake and a performance intercooler. The gain is considerably higher, but it requires professional component selection.

Does the factory warranty of the Jeep Grand Cherokee remain valid after Stage 1?

After remapping the Jeep Grand Cherokee, the official factory warranty on the engine and gearbox is lost (this applies to any manufacturer when the ECU is modified). CHIPOK guarantees the quality of the calibration and free revisions.

How long is the wait for a Stage 1 remap for the Jeep Grand Cherokee?

Reading and writing via OBD takes 25-30 minutes on the Jeep Grand Cherokee. Bench reading (BDM/JTAG) takes about 60 minutes plus refitting. Remote file processing at CHIPOK takes 5-30 minutes.

How do you roll back to the factory firmware of the Jeep Grand Cherokee?

Before Stage 1 the original of the Jeep Grand Cherokee 5.7 V8 326 hp is read out and saved — returning to the factory state is possible at any time.

How much does chip tuning the Jeep Grand Cherokee 5.7 V8 326 hp cost?

The remap price for the Jeep Grand Cherokee 5.7 V8 326 hp is dynamic and is calculated in the CHIPOK calculator based on the selected options. A credit-based payment model, with no subscription fees.

Last updated: 31.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno