Yamaha F425 XTO 5.6L V8 Nizpro 482 Enhanced ECU Tune

Unlock stronger real-world performance from your Yamaha XTO 425 with the Nizpro 482 Enhanced calibration, designed to increase horsepower, improve throttle response, and deliver stronger performance across the entire RPM range while maintaining reliability.

This calibration is ideal for large offshore boats where maximum torque, load handling, and sustained performance are critical. The biggest gains are felt when pushing heavy vessels, accelerating onto plane, and maintaining speed offshore.

Performance Data
Stock Output: 425 HP
Tuned Output: 482 HP
Power Increase: +57 HP

Fuel Savings: Up to 8–10% improved efficiency
Minimum Fuel Required: 89 Octane

What this tune improves

The Nizpro 482 Enhanced calibration enhances the XTO platform with improved drivability and power delivery.

Real-world improvements include:

Stronger hole shot on heavy boats
Improved mid-range torque under load
Smoother and sharper throttle response
Better efficiency during cruising
More usable power in offshore conditions

This results in a more refined and capable offshore engine.

Compatible Engines

This product is for Yamaha XTO 425 5.6L V8 applications using the ECU numbers listed below.

XTO 425 — 2019 to current

ECU Compatibility

• 6GR-00, 6GR-01, 6GR-03, 6GR-10, 6GR-11

How to order

• Select your Service Type
• Select your ECU Part Number (Abridged)
• Complete checkout
• Mail in your ECU or schedule local mobile service if eligible

Service Options

Mail-In ECU Service
Nationwide service available.

Local Mobile Flash Service (Florida)
Available for qualifying local appointments within 40 miles of Ormond Beach, FL.

Important before ordering

If you do not see your ECU listed, select Not Listed / Unsure. We will verify compatibility before flashing.

Notes
Performance results can vary based on hull, prop, load, fuel quality, and operating conditions.