There is no single best tuner for every 5.7L HEMI Ram: year, model, transmission, eTorque configuration, and PCM generation can change what fits and what hardware or service is required. For one verified example, DiabloSport lists its inTune i3 Platinum with modified PCM kit, part PKITDR578S20-I3, for the 2020 Ram 1500 5.7L HEMI. That listing is a specific application, not a fitment claim for other years or Ram models.
What to check before choosing a tuner
“5.7 HEMI Ram” is not enough information to establish compatibility. Before buying, identify the model year and Ram model, transmission, whether the truck has eTorque, and the PCM or controller generation. Use the selected manufacturer’s current support list or compatibility checker, and confirm fitment using the truck’s VIN or controller details.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
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Superchips Pulsar 8 Performance Levels Shift on The Fly Inline Module 2019 Ram 1500 5.7L Hemi | $813.95 | Buy on Amazon |
- Confirm the exact vehicle and controller are supported.
- Find out whether the package includes a modified PCM, requires an exchange, or involves sending in the truck’s PCM.
- Check for any required cable or interface, as well as licensing and tuning costs.
- Clarify whether calibrations are preloaded, whether custom tuning is supported, and whether transmission tuning is available for your application.
- Verify fuel requirements and the calibration’s intended use with the manufacturer or tuner.
Two tuning routes to compare
| Route | Documented application and requirements | What to verify |
|---|---|---|
| DiabloSport inTune i3 Platinum with modified PCM | DiabloSport lists kit PKITDR578S20-I3 for the 2020 Ram 1500 5.7L HEMI. Holley’s listing and DiabloSport’s listing describe this specific product. | Confirm your truck matches the listing, what PCM is supplied, which calibrations are included, any fuel requirements, and current price and availability. |
| HP Tuners VCM Suite with MPVI3 | HP Tuners lists support for multiple Ram 5.7 configurations, with requirements varying by controller. Some applications require PCM modification or service; supported GPEC5 applications have a separate service path. See its Stellantis support listing, GPEC5 service page, and GPEC2/GPEC2A PCM modification guidance. | Check the exact year and controller, whether service or a cable/interface is required, and the associated licensing, downtime, and tuning costs. |
These routes are not a head-to-head dyno comparison. The right choice depends on exact fitment and whether you want to use supported calibrations or work with a tuner on a custom setup. HP Tuners advises buyers without tuning knowledge to seek professional assistance; see its getting-started guidance.
PCM access can determine the full cost and process
A handheld device may not be the whole purchase on a late-model truck. Depending on the controller and tuning route, getting access can involve a modified PCM, an exchange or send-in service, or additional access hardware. HP Tuners documents different requirements for GPEC2/GPEC2A and GPEC5 applications; those are HP Tuners-specific requirements and should not be assumed to apply to a DiabloSport kit or every Ram. Confirm the current procedure directly with the manufacturer for your exact controller before ordering.
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- User-selectable MDS on/off
How much power can a tuner add?
DiabloSport advertises gains of up to 25–30 rear-wheel horsepower for certain applications, including the product listing associated with the 2020 Ram 1500 5.7L kit. This is a manufacturer claim, not an independently verified result or a guaranteed gain on an individual truck. The available evidence does not establish an independent head-to-head test of the options above. Do not treat advertised output as a promise of horsepower, fuel economy, towing improvement, engine life, or warranty outcome.
MDS and other calibration features
The 5.7L HEMI in the 2014 Ram 1500 incorporated Multi-Displacement System (MDS), according to Ram’s 2014 Ram Pickups brochure. DiabloSport advertises MDS-related settings on some kits, but that does not establish that every tuner can disable or change MDS on every model year. Check the features and calibration support for the exact kit and truck.
Road-use and emissions checks
The product pages cited here do not establish that every tune is approved for road use in every jurisdiction. Before installing a calibration, verify that the specific product and tune meet the emissions and vehicle-use rules where the truck is registered and driven. Do not infer legality from the fact that a tuner is sold for the vehicle.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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