Our harness manufacturer closed up shop. No ETA once all current stock is sold out.

We are offering our very high quality Haltech Patch harnesses for sale, separate of our ECU kit.

Currently offering for Elite 550/750 and 4AGE 20V engines.  4AGE 16V and BEAMS 3SGE to follow!

Patch Harness

• Interfaces between Haltech ECU and OEM style Engine harness (ecu connectors)
• Includes break out connectors for Coil On Plug conversion
• AUX I/O break out for Radiator Fan, Wideband O2 input, Rev limiter, etc. 
• Milspec grade wiring and high quality terminations

Full Harness

• Interfaces between Haltech ECU and Engine directly
• Includes all major engine sensors - including VVT, 02 Sensor, TPS, etc. 
• Details include two types of oil pressure sender connectors to retain your gauge cluster functionality
• AUX I/O break out for Radiator Fan, Wideband O2 input, Rev limiter, etc. 
• Milspec grade wiring and high quality terminations