The 2JZ-GE SC300 in auto trim finally gets a standalone ECU path, and this harness is how you get there without cutting into your factory wiring.
The Lexus SC300 2JZ-GE platform has a strong tuning community, and standalone ECU support opens what the factory management keeps locked down. The Tuned By Shawn PNP Wiring Harness Kit for the Haltech Nexus connects directly to your factory harness without any permanent modifications, giving the Haltech Nexus full standalone engine control. No cutting, no splicing, fully reversible.
Advantages
- Power delivery that's smooth and consistent across the full torque curve
- Fuel and ignition timing calibrated to your actual modifications, not Toyota's conservative baseline
- Idle stability that's locked in regardless of temperature
- Consistent engine behavior across temperature ranges
- A proper tuning foundation for this specific chassis
Features
- Plug-and-play fitment for 1992-1997 Lexus SC300 2JZ-GE, all transmission types
- Compatible with Haltech Nexus R3, R5, S2, and S3 ECUs
- No cutting or splicing of factory wiring
- OEM-quality connectors, USA-built by Boomslang Fabrication
- Fully reversible, factory harness preserved
- For competition and off-road use
The Details
Built specifically for this vehicle's connector layout with OEM-spec connectors and correct wire gauge throughout. Your factory harness stays completely untouched and the vehicle can return to stock at any time. In automatic transmission applications, the factory ECU remains in parallel for transmission control while the Haltech Nexus manages the engine.
Kit Includes
- 1x Boomslang PNP wiring harness for 1992-1997 Lexus SC300 2JZ-GE
- Haltech Nexus ECU sold separately
Fitment
1992-1997 Lexus SC300 / 1992-1997 Toyota Supra 2JZ-GE, Automatic Transmission.