Megasquirt Ecu IS300 Lexus 1jz 2jz

Build Your 1JZ or 2JZ IS300 Your Way

You built the car. Now you need an ECU that gives you the control and flexibility to finish the job.

The MegaSquirt MS3 Pro Ultimate is a powerful standalone engine management solution for custom Lexus IS300 1JZ and 2JZ builds—especially for enthusiasts who want to design their own wiring, configure their own setup, and have room to grow.

And with your purchase from JJRBoost Motorsports, you don't just get the ECU.

🎁 FREE WITH YOUR PURCHASE: Remote Basemap Setup

Buying a standalone ECU can be intimidating.

Which sensors do I use?
How should the ECU be configured?
Where do I start with the base calibration?

That's why JJRBoost Motorsports is including a FREE Remote Basemap Setup with your purchase.

After you provide the required information about your engine and setup, we'll work with you remotely to help establish a starting basemap for your specific application.

You get:

• Remote setup assistance
• Initial basemap configuration
• Application-specific setup guidance
• Help getting your ECU ready for initial startup
• A starting point for your tuning process

Instead of opening the box and wondering "Now what?", you'll have a starting point built around your project.

That's our way of helping you get from ECU on the workbench → to engine startup faster.

What You Get

MegaSquirt MS3 Pro Ultimate ECU

A highly configurable standalone ECU designed for serious performance applications and custom engine management.

DIY Wiring Capability

Build your harness around your exact IS300, 1JZ, or 2JZ configuration instead of being limited by a factory ECU setup.

Advanced Engine Control

Configure fuel, ignition, boost control, sensors, auxiliary outputs, data logging, CAN communication, and other functions according to your build.

Ideal For

• Lexus IS300 1JZ swaps
• Lexus IS300 2JZ swaps
• Turbo 1JZ builds
• Turbo 2JZ builds
• Drift cars
• Drag cars
• Street performance builds
• Custom engine swaps
• DIY wiring projects
• High-performance applications

Build It. Wire It. Tune It.

The MS3 Pro Ultimate gives you the flexibility to create a wiring system around your engine, your sensors, your fuel system, your ignition setup, and your goals.

Whether you're putting together a reliable street car or building a serious boosted IS300, you have a platform that can grow with the project.

Your Purchase Includes More Than Just an ECU

MegaSquirt MS3 Pro Ultimate

Standalone engine management for your custom build.

FREE Remote Basemap Setup

We'll help establish a starting configuration based on the information you provide about your specific vehicle and engine combination.

JJRBoost Motorsports Support

Get help understanding the setup process so you're not left trying to figure everything out alone.

Here's the Big Idea

You don't need another box sitting on your workbench.

You need a starting point.

That's why JJRBoost Motorsports combines the MS3 Pro Ultimate with FREE Remote Basemap Setup.

You build the car.
You build the wiring.
We help you get the ECU started.

Ready to Build Your IS300?

Get your MegaSquirt MS3 Pro Ultimate and claim your FREE Remote Basemap Setup from JJRBoost Motorsports.

Build it. Wire it. Boost it.

Important Compatibility & Tuning Notice

ECU configuration, wiring requirements, sensors, ignition systems, injectors, and compatibility can vary depending on the specific engine and vehicle configuration.

The remote basemap is intended as a starting calibration, not a replacement for professional dyno or road tuning. Final tuning should be performed by a qualified tuner using the appropriate equipment and safe operating procedures.

Customers should provide accurate information about their engine, injectors, sensors, ignition system, fuel system, trigger configuration, and intended application for the basemap setup.