The Billet Performance Products Toyota JZ R35 coil conversion kit is designed to replace factory 1JZ and 2JZ ignition coils with proven R35 GT-R coils for a stronger, more consistent ignition setup. This is a common upgrade on JZ engines that see age, boost, ethanol or harder use, where ignition reliability becomes more important than ever. It suits street, drift, drag and circuit builds, and makes sense alongside ECU upgrades, fresh wiring and other ignition system components. Features Fitment: Toyota 1JZ, 1JZ VVTi, 2JZ and 2JZ VVTi Coils: Supplied with genuine Hitachi R35 coils Adapter material: 6061-T6 billet aluminium Function: Converts the engine to R35 GT-R ignition coils Colour options: Black, Blue, Purple or Red Typical Applications Street and weekend JZ builds replacing tired factory coils High-boost turbo builds needing a more robust ignition setup Drift, drag and circuit engines with aftermarket ECU control Fresh engine builds where the ignition system is being upgraded at the same time Fitment Notes Suits Toyota 1JZ, 1JZ VVTi, 2JZ and 2JZ VVTi engines This listing is the complete coil conversion kit, not the bracket-only version If you only need the billet mount, use the bracket-only version instead Confirm your wiring and ECU strategy before installation