RameyRacing Mercury 450R Stage 2

Stage Two Engine Rebuild Package

Boosted Power. Race-Ready Control. Built to Dominate.

Our Stage Two Engine Rebuild Package takes everything from our rock-solid Stage One foundation and turns it up a notch. Designed for serious power seekers, this package adds high-performance boost components and top-tier electronics to give you full control and next-level horsepower.

Whether you’re chasing record times or just want to own every throttle hit. Stage 2 engineered to deliver uncompromising reliability, precision, and power.

What’s Included – Stage One Foundation + Stage Two Upgrades

 Supercharger Pulley Set: Optimized pulley system to safely increase boost and maximize the efficiency of your forced induction setup.

MoTeC M150 ECU Kit: Installation of the M150 engine management system equipped with fuel, ignition and throttle tunability and data logging. This solution also supports other OE ECU features, including:

• • Key Start Via OE CAN
  • Full dash functionality including warnings and running time for maintenance
  • Integration with multi engine boats via CAN
  • Stern Leg Position Monitoring
  • Multi Engine Synchronization

Ferrea Valve Springs & Retainers: Built for high-RPM reliability, these race-proven components maintain valvetrain stability under intense boost and power.

Block Work

• Full disassembly and ultrasonic deep cleaning
• Decked for a perfect head gasket seal
• Bored to +0.25mm for slight displacement gain
• Diamond honed for precise ring seating and oil control

Cylinder Head Service

• Full cleaning and inspection
• Multi-angle precision valve job
• Resurfaced for perfect head-to-block mating
• Ferrea performance valve springs and retainers installed