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90 Days Warranty
90-day warranty for non-performance engines, 30 days for performance. Covers internal parts, excludes labor. Read more

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Product Information
Toyota Century / Supra 1GZ-FE JDM Engine | 5.0L V12 DOHC Dual VVT-i Motor
| Feature | Details |
| Engine Code | 1GZ-FE |
| Displacement | 5.0 Liters (4,996 cc) |
| Configuration | 60° V12 DOHC 48-Valve |
| Valvetrain | Dual VVT-i (Variable Valve Timing with intelligence) |
| Horsepower | 276–295 hp (Gentleman's Agreement restricted) |
| Torque | 355 lb-ft @ 4,000 rpm |
| Redline | 6,000 RPM |
| Transmission | 4-Speed (1997-2004) or 6-Speed (2005+) Automatic |
This 1GZ-FE powertrain is the primary choice for:
1997-2017 Toyota Century (GZG50): Direct OEM replacement.
Toyota Supra (A80/MK4) Swap: The legendary "Top Secret" style V12 conversion.
Custom Restomods: A popular choice for high-end Toyota Land Cruiser (J80/J100) and Lexus LS conversions.
Technical Insight: The 1GZ-FE features two independent ECUs (one for each 6-cylinder bank), allowing the engine to run as an inline-6 in the event of a sensor failure—a testament to its "failure-is-not-an-option" design.
Due to the complexity of a 12-cylinder engine, please adhere to these technical guidelines:
Dual ECU Management: For custom swaps (Supra/LS), we strongly recommend utilizing a standalone engine management system (e.g., Haltech, MaxxECU, or Motec) to simplify the wiring and unlock the true power potential, which can easily exceed 500+ HP with bolt-ons.
Oil System: The 1GZ-FE utilizes a large oil capacity. Ensure the oil cooler lines are properly flushed and that high-quality 5W-30 or 0W-30 synthetic oil is used to maintain the VVT-i phasers.
Physical Dimensions: Measuring approximately 32 inches long, this engine is a tight fit for most engine bays. Ensure your chassis can accommodate the length and the 60° bank angle.
Essential Maintenance: We recommend replacing the following during the swap:
Spark Plugs: 12x NGK Iridium plugs (BKR6EIX-11).
Gaskets: Intake manifold gaskets and valve cover gaskets (highly recommended as they are difficult to access once installed).
Serpentine Belt: Replace the main drive belt and inspect the hydraulic fan pump (if equipped).
Fuel Requirement: 91+ Octane Premium fuel is required to ensure the knock sensors do not pull timing on this high-displacement assembly.
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