R35 Coil Conversion Kit for Toyota JZ- Includes bracket , coils, connectors and harness

Ignition Evolution: R35 Coil Conversion Kit for Toyota JZ

For the Toyota 1JZ and 2JZ platform, the factory ignition system is a well-known weak point when pursuing high horsepower. The original “wasted spark” coils often suffer from spark blow-out at high boost levels, and the aging factory loom is prone to heat degradation. The R35 Coil Conversion Kit is the ultimate solution, adapting the world-class ignition technology from the Nissan GT-R R35 to the JZ cylinder head. This complete kit provides everything needed to move to a Sequential Ignition setup, providing a massive increase in spark energy and reliability. Whether you are building a 1000HP Supra or a high-response 1JZ drift car, this conversion is a foundational upgrade for any standalone ECU integration project.

The Engineering of Hitachi “R35” Ignition Coils

The coils included in this kit are Genuine Hitachi R35 GT-R units. These coils are highly sought after in the tuning world because they are “Intelligent” coils with high energy output and excellent dwell characteristics. Unlike the stock JZ coils, which are Inductive ignition units designed for stock power, the R35 coils are built for the high-pressure environment of a modern twin-turbo V6. They provide a significantly “hotter” spark, ensuring complete combustion even under 30+ PSI of boost. The kit features a 6061-T6 Billet Aluminium bracket that has been precision-engineered to seat these coils perfectly over the JZ spark plug wells. The bracket is anodized in black and includes Positive Crankcase Ventilation (PCV) block-offs for a clean, professional finish.

Operational Benefits: Precision and Power

Moving to R35 coils allows the tuner to run a more aggressive fuel map calibration with confidence. By eliminating spark blow-out, the engine can maintain consistent power to the redline. In a standalone ECU integration scenario (using a Haltech Elite or Nexus), this kit allows for individual cylinder ignition timing. This means the tuner can retard timing on a specific “hot” cylinder while keeping the others at peak efficiency, providing an extra layer of detonation protection. The included pre-terminated COP harness is a massive benefit; it is designed to be plug-and-play with Haltech 2JZ terminated looms, but also includes a DT-8 connector for universal applications, making harness integration simple and professional.

Fitment and Integration Strategy

This kit is designed to suit 1JZ-GTE, 1JZ VVTi, 2JZ-GTE, and 2JZ VVTi engines. The bracket’s design accounts for the different valve cover geometries of the VVTi vs. non-VVTi heads. Installation requires removing the factory coil-packs and igniter (if applicable). The new harness bypasses the old, brittle factory ignition wiring, delivering a clean trigger signal and strong 12V power directly from the battery via the ECU loom. For those not using a Haltech terminated harness, the included DT-8 opposing connector allows for easy integration into any custom engine loom. This kit is a “zero-compromise” approach to JZ ignition performance.

Technical Specifications

Summary & Includes

The R35 Coil Conversion Kit is the definitive ignition upgrade for the Toyota JZ engine family. Includes: Billet Bracket, 6 x Genuine Hitachi Coils, COP Ignition Harness, and Mounting Hardware. Note: Essential for high-boost 2JZ and 1JZ applications.