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Haltech HT-186004 i6 Timer (EV1) Primary Injector Harness
Haltech HT-186004 i6 Timer (EV1) Primary Injector Harness
SKU:HT-186004
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- Authorised Haltech dealer
- Fast Shipping Australia Wide
- Real fitment advice
The Haltech HT-186004 i6 Timer (EV1) Primary Injector Harness is a plug-and-play injector sub-harness designed to connect six EV1 (Timer-style) fuel injectors directly to your Haltech Nexus engine management system. Engineered specifically for Nexus Rebel JZ main terminated harnesses, this harness ensures accurate fuel injector control and reliable signal integrity in high-performance applications.
Each injector connector is clearly labelled, allowing fast and error-free installation while ensuring correct cylinder allocation. This is critical in turbocharged, high-RPM and motorsport engines where precise fuel delivery directly impacts power, drivability and engine safety.
Manufactured to Haltech’s motorsport-grade wiring standards, this injector harness is ideal for street, track and race Toyota JZ engine builds running traditional EV1 / Timer-style fuel injectors.
- Direct plug-and-play injector harness for EV1 (Timer-style) fuel injectors
- Designed to suit Haltech Nexus Rebel JZ main terminated harnesses
- Clearly labelled connectors for accurate injector-to-cylinder mapping
- Motorsport-grade wiring for durability in high-heat environments
Included:
- 1 × Haltech HT-186004 i6 Timer (EV1) Primary Injector Harness

Why buy your Haltech from Racing Solutions
Authorised Australian Haltech dealer. Genuine stock, 12-month warranty, and over 20 years of hands-on trade experience behind every recommendation.
Haltech buying information
Warranty & authorised dealer
Racing Solutions is an authorised Australian Haltech dealer. Everything we supply is genuine, current-revision Haltech stock — never grey or parallel import.
Haltech products come with a limited 12-month warranty covering defects in materials and workmanship from the date of purchase.
Warranty claims are handled directly by Haltech. You'll need valid proof of purchase — your original invoice or receipt. If you're not sure where to start, get in touch and we'll point you in the right direction.
Price match
If you find this exact item advertised for less by another authorised Australian Haltech dealer, contact us before you order and we'll match the price.
To qualify:
- The competitor must be an authorised Australian Haltech dealer
- Same part number, brand new, and currently in stock with them
- The price must be publicly advertised and GST-inclusive
- We compare the total delivered price, including shipping
- Excludes clearance, run-out, sale events, member-only pricing, and auction or marketplace listings
Call 0458 998 395 or use the contact form below and we'll confirm within one business day.
Dispatch & delivery
If the item is in stock at our Perth warehouse or at Haltech, it ships same or next business day.
Not every product is held in stock, including at Haltech. Items that need to be built or restocked can take up to 4 weeks.
If you want a firm lead time before you order, get in touch and we'll confirm it for you.
Tuning & fitment support
Buying the ECU is the start, not the end. We can talk you through which harness, sensors and accessories your combination actually needs, and point you toward tuners who know the platform.
Over 20 years of hands-on trade experience sits behind that advice — we build and run these cars ourselves.
Not sure which ECU or harness you need?
Haltech's range spans wire-in ECUs, plug-in ECUs, terminated harnesses and plug-and-play kits. The right choice depends on your engine, throttle type (cable or drive-by-wire) and injector connectors.
Send us your engine, model year and current setup and we'll confirm the correct part number before you buy.