DiabloSport Modified PCM and inTune i3 Programmer Kit

2021 Dodge Challenger 5.7L / 6.4L

PKITCHALV821-I3

Overview:

The DiabloSport Modified PCM and inTune i3 Programmer Kit is a comprehensive performance upgrade solution designed specifically for the 2021 Dodge Challenger equipped with 5.7L or 6.4L engines. This kit combines a preprogrammed, unlocked Performance Control Module (PCM) with the versatile inTune i3 handheld tuner, allowing enthusiasts to unlock the full potential of their vehicle’s powertrain. Ideal for drivers seeking increased horsepower, improved throttle response, and customizable tuning options, this kit delivers a seamless blend of power and control.

With factory calibration saved and a modified PCM ready to install, this kit ensures a straightforward upgrade path while maintaining the ability to revert to stock settings if needed. The inTune i3 programmer offers user-friendly controls and multiple tuning options, making it suitable for both novice and experienced tuners.

Key Features:

This kit provides a range of advanced tuning capabilities and performance enhancements tailored to the 2021 Dodge Challenger:

• Gain up to 20 rear-wheel horsepower (rwhp) and 18 lb-ft rear-wheel torque (rwtq) on 93 octane fuel; up to 25 rwhp on the 6.4L engine
• Includes multiple tune options: 93 Octane Diablo Tune, 91 Octane Tune, and Performance Transmission Control Module (TCM) tune for the 8-speed automatic transmission
• Speed limiter control with On/Off capability to increase top speed
• Adjustable target cooling fan temperatures ranging from 150° to 230°F for compatibility with aftermarket thermostats and cooling systems
• Tire size adjustment from 20” to 44” to correct speedometer readings for different tire setups
• Wide Open Throttle (WOT) fuel adjustments from 1,000 to 7,000 RPM with ±20% tuning range for precise air/fuel ratio control
• WOT spark timing adjustments from 1,000 to 7,000 RPM with ±10 degrees for optimized ignition timing
• Control over MDS (Multiple Displacement System) and traction control on/off settings
• Full-color touchscreen interface on the inTune i3 for easy navigation and tuning
• Wi-Fi update capability to keep software current and add new features
• Multi-license support allowing tuning of multiple vehicles with one device
• Data logging and diagnostic trouble code (DTC) reading and clearing functions

Construction & Design:

The modified PCM is engineered to meet OEM standards and comes preprogrammed and unlocked for immediate use with DiabloSport tuning devices. It is housed in a durable ABS plastic case designed to withstand the harsh automotive environment. The inTune i3 programmer features a robust, ergonomic design with a vibrant full-color touchscreen display, providing intuitive control and clear visibility in all lighting conditions. The handheld device is compact and portable, making it easy to use both in the garage and on the road.

Performance & Sound

By optimizing fuel delivery, ignition timing, and transmission shift points, this kit enhances engine performance and responsiveness. Drivers can expect noticeable gains in horsepower and torque, improved throttle response, and smoother transmission shifts. The ability to disable the speed limiter and adjust traction control settings also allows for a more engaging driving experience. While the kit primarily focuses on performance tuning, the refined engine management can contribute to a more aggressive and confident exhaust note under acceleration.

Installation & Fitment:

This kit is designed specifically for the 2021 Dodge Challenger models equipped with 5.7L or 6.4L engines. Installation involves replacing the factory PCM with the DiabloSport modified unit and using the inTune i3 programmer to load and manage tunes. It is critical to save the stock calibration using the tuning device before removing the original PCM to ensure a safe and reversible upgrade. Detailed removal and installation videos are available on DiabloSport’s YouTube channel to assist with the process. No permanent vehicle modifications are required, making this a direct OEM replacement upgrade.

What's Included:

• DiabloSport Modified PCM preprogrammed for 2021 Dodge Challenger 5.7L / 6.4L
• inTune i3 handheld programmer (Part #8345) with preloaded tunes
• Windshield mount for the inTune i3 device
• Instruction manual and access to online installation videos

Ideal For:

This kit is perfect for Dodge Challenger owners who want to unlock additional horsepower and torque without compromising reliability or drivability. It suits enthusiasts looking for a plug-and-play solution with customizable tuning options, including those who want to optimize their vehicle for different fuel grades or aftermarket modifications. The inTune i3’s data logging and diagnostic features also make it an excellent tool for tuners and DIY mechanics who want to monitor and adjust their vehicle’s performance parameters.

Emissions Note

This product is not CARB (California Air Resources Board) compliant and is not legal for use in California or other states with similar emissions regulations.

DiabloSport makes handheld tuners and ECU tuning solutions aimed at unlocking additional performance and improving drivability for many late-model domestic trucks and muscle cars. Their devices and supported tuning ecosystem are commonly used to optimize engine and transmission calibrations after mods like intakes, exhaust, or gearing changes.