Speed Scene Wiring
LS7 Wire Harness
505+ horsepower. The largest, most powerful small-block ever built. Pro Series LS7 harness with E40 ECM, fly-by-wire throttle, and complete component package. USA made since 1999.
Start a BuildLS7 Wire Harness | E40 ECM | Pro Series
This Pro Series LS7 harness is field-tested before it ships. Many builders still treat the LS7 as the benchmark small-block — 505 horsepower from the factory, and more with tuning.
This Pro Series LS7 wire harness is wired for a standard 6-speed. We also offer a 4L65E automatic. For automatic users, please be aware: GM has made a separate controller (ECM) for the automatic transmission to shift. For an LS7 with fly-by-wire throttle and 4L65E, you will be running 2 computers.
This package price includes the computer, the program loaded for a standard shift car, HO2 sensors, O2 bungs, MAF sensor, pedal, and a 12-circuit Delphi fuse box. All tech and service is provided by in-house engineering and tech staff.
Note: This harness will NOT run the 6L80E or any paddle-shifted operating system — this is not available at this time.
What's in the Package
- E40 ECM computer with program loaded
- HO2 sensors & O2 bungs
- MAF sensor
- Accelerator pedal
- 12-circuit Delphi fuse box
- Standard 6-speed shift wiring (default)
- 4L65E automatic option available
EPA Approved Checklist
- VSS Circuit
- Diagnostic Link Connector
- Correct Emissions Connectors
- VSS Pigtail
- Alternator
- Tach Pigtail
Ready to Build Your LS7 Harness?
505+ HP. Complete package. Pro Series. USA made since 1999.
Start a Build