This is the Stage IV Motor/Gearbox kit for the Mustang, Porsche GT3, and C7 Corvettes/McQueens that started life as 12v. The Stage IV kit is specifically designed for vehicles running at 18 or 24 volts. The Massive 775 motors provide insane amounts of torque for off-road and handle 24 volt loads without a care. The weakest link in the gearbox, the First Gear, has been replaced with a hardened steel first gear which also has 2 ball bearings for maximum efficiency. The thicker-then-molasses stock grease has been replaced with our Teflon Race Grease designed to coat the gears and shafts to make them more slippery and create less heat buildup. The gearbox housings and remaining gears are a new, durable design developed by MLToys' engineers. This setup is for die-hard speed addicts only. Installation is simply removing your old gearboxes and putting your Stage IV in its place. Kit includes:

- 2 massive 775 size Modified Motors with Internal Cooling Fans pre-installed in gearboxes.
- Torque sleeves on both motors.
- Quick Connect Motor Wires
- 2 Hardened Steel Pinion Gears with Lifetime Warranty*.
- 2 Hardened Steel First Gears with Lifetime Warranty*.
- 4 Steel Ball Bearings.
- MLToys Teflon Race Grease for even more speed, motor durability, and more run time.
- 2 MLToys Phoenix Gearboxes including stronger nylon gears, improved lubricating, stronger housings, and low friction race grease.
- Fully assembled! Just swap out with your stock motor/gearboxes and follow the break-in instructions!

Motors and gears are safe for up to 24 volts. We strongly recommend using Steel First Gears when running 18 volts or more. Not for use with lithium batteries unless you use our Soft Start Low Voltage Lithium Module.

Just like when modifying a real car, modifying a Power Wheels voids all warranties. If you have made any non-MLToys modifications to your car you should reach out to our tech support first to check compatibility. MLToys bears no responsibility for damage to vehicle, persons, or property incurred by modifying a vehicle. Be Smart, Be Safe, and Have Fun!