The Haltech Elite 2500 LSx Terminated Harness Kit is a complete engine management solution for GM GEN IV LS-based engines, including LS2 and LS3 variants. Featuring full Drive-By-Wire capability and pre-terminated wiring, this kit significantly reduces installation time while maximizing functionality and performance tuning potential.

Designed for manual transmission applications, this system is ideal for racing builds and engine conversions seeking complete control over ignition, fuel, cam timing, boost, and more—all through the powerful Elite 2500 ECU and intuitive NSP software.

Note: For competition/off-road use only (NOT CARB LEGAL). LS2 ignition coils and harnesses are not included. Check alternator connector compatibility before purchase.

Key Features

• Turnkey Engine Control Kit: Includes Elite 2500 ECU, terminated engine harness with fuse block and firewall grommet, and USB programming cable.

• Direct Fitment: Pre-wired for GM LSx engines with 7-pin coil harness connectors and common US-style Delco/Bosch alternator.

• Advanced ECU Capabilities:

  • Drive-by-wire throttle support

  • Flex fuel control and dual bank closed-loop O2

  • Variable camshaft control (up to 4 cams)

  • Dual knock sensor support and high-speed data logging

• Racing Functions:

  • Launch control, traction control, anti-lag, and boost by gear/speed/timer

  • Nitrous support with 6 stages and 3D corrections

  • Flat shift, trans brake, and optional torque management

• Tuning Flexibility: Supports 4D tuning tables, per-cylinder adjustments, and multiple user-defined conditions for ultimate control

Vehicle Applications

• Engine Compatibility: GM GEN IV LSx (e.g., LS2, LS3)

• Alternator Compatibility: Common US-style Delco/Bosch connector (see guide for variations)

• Transmission Requirement: Manual transmission only

Kit Contents

• Haltech Elite 2500 ECU with DBW and race functionality

• Terminated engine harness with fuse block and firewall grommet

• USB programming cable

Note: LS2 ignition coils and coil harnesses not included. Alternator adapter (HT-040090 or HT-040091) may be required.