DiabloSport Modified PCM and inTune i3 Programmer Kit

2021 Ram 1500 5.7L V8 8-Speed (Except E-Torque)

PKITDR578S21-I3

Overview:

The DiabloSport Modified PCM and inTune i3 Programmer Kit is a comprehensive performance upgrade solution designed specifically for the 2021 Ram 1500 equipped with the 5.7L V8 engine and 8-speed transmission, excluding E-Torque models. This kit combines a pre-programmed, vehicle-specific modified Powertrain Control Module (PCM) with the versatile inTune i3 handheld tuner, allowing enthusiasts to unlock significant horsepower and torque gains while maintaining full control over engine and transmission parameters.

Ideal for Ram 1500 owners seeking enhanced throttle response, improved power delivery, and customizable tuning options, this kit delivers a seamless tuning experience without requiring vehicle downtime. It supports multiple fuel grades and includes performance transmission calibrations, making it a turnkey solution for maximizing your truck’s potential.

Key Features:

This DiabloSport kit offers a wide range of tuning capabilities and performance enhancements, including:

• Preloaded multiple performance tunes for 87, 91, and 93 octane fuel
• Gain an estimated 25-30 rear wheel horsepower on premium fuel
• Disable Multi-Displacement System (MDS) for full-time V8 operation
• Adjust throttle response to optimize pedal feel and driving dynamics
• Remove vehicle top speed limiter for increased maximum speed
• Performance transmission control module (TCM) tune included for smooth 8-speed shifting
• Adjust idle RPM and rev limiter settings by ±400 to ±500 RPM
• Enable or disable traction control and Electronic Stability Program (ESP)
• Customize cooling fan activation temperatures between 150°F and 230°F
• Correct speedometer readings for tire sizes ranging from 20” to 44”
• Fine-tune wide-open throttle (WOT) fuel and spark timing for optimal air/fuel ratios and ignition advance
• Read and clear diagnostic trouble codes (DTCs) with ease
• Supports custom tuning from DiabloSport’s network of CMR tuners
• Includes required bypass module or cable for seamless installation
• Wi-Fi enabled for easy software updates

Construction & Design:

The modified PCM is expertly programmed and built on a durable ABS housing, engineered to meet the demanding conditions of daily driving and performance use. The inTune i3 handheld tuner features a bright color touch screen display housed in a rugged enclosure designed for intuitive operation and long-term reliability. Both components are crafted to integrate flawlessly with your Ram 1500’s factory systems, ensuring reliable communication and tuning precision without compromising vehicle safety or drivability.

Performance & Sound

By unlocking additional horsepower and torque, this kit enhances acceleration and overall engine responsiveness. Disabling MDS provides consistent V8 power delivery, eliminating the transition delays associated with cylinder deactivation. Adjustments to throttle mapping and rev limits contribute to a more aggressive and engaging driving experience. While this kit primarily focuses on engine and transmission tuning, the improved powertrain performance can indirectly enhance exhaust sound by enabling more robust engine operation under load.

Installation & Fitment:

Installation is straightforward and designed to minimize vehicle downtime. The kit includes a modified PCM pre-programmed to your specific 2021 Ram 1500 5.7L 8-speed transmission model, eliminating the need to send your stock PCM away for unlocking. Before removing the stock PCM, it is essential to save your vehicle’s original calibration using the inTune i3 device, following the included instructions carefully. The required bypass module or cable is included to ensure compatibility and safe installation. No permanent vehicle modifications are necessary, and the process can typically be completed with basic hand tools.

What's Included:

• DiabloSport Modified PCM programmed for 2021 Ram 1500 5.7L 8-Speed (except E-Torque)
• inTune i3 handheld programmer (Part #8345)
• Required bypass module or cable for installation
• Instruction manual with detailed installation and tuning guidance
• Preloaded performance tunes for multiple fuel grades
• Software for reading/clearing DTC codes and custom tuning support

Ideal For:

This kit is perfect for Ram 1500 owners who want to maximize their truck’s performance without sacrificing reliability or drivability. It suits enthusiasts looking to increase horsepower and torque, improve throttle response, and customize transmission behavior. Whether you use your Ram for daily driving, towing, or spirited performance, this kit provides the flexibility and power enhancements to elevate your driving experience.

Emissions Note

This product is not CARB (California Air Resources Board) compliant and is not legal for sale or use in California or other states adopting CARB regulations. Please check local laws and regulations before purchasing or installing this performance kit.

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.