IAC Ignition Harness Pro-Flo 4 GM LS 24x

The Edelbrock IAC Ignition Harness Pro-Flo 4 GM LS 24x (part number 35713) is a precision fuel injection wiring harness designed specifically for GM LS-Series engines equipped with Pro-Flo 4 EFI systems. This harness is essential for ensuring clean, noise-free communication between the engine's ignition system and the electronic fuel injection controller, which is critical for proper engine startup and drivability.

The harness is designed to work with 24-tooth crankshaft reluctor rings, which is a key specification for accurate spark timing. Proper routing and shielding of the harness away from high-voltage ignition leads and alternator output are crucial to prevent interference that can affect idle stability and cold-start performance. This unit measures 6.5 x 3 x 12 inches, making it compact enough for tight engine bays.

Builders converting carbureted or older fuel-injected LS engines to standalone Pro-Flo 4 management, as well as those troubleshooting signal issues in existing EFI installations, will benefit from this OEM-quality harness. Its design ensures compatibility with the 24x reluctor configuration standard across most production LS blocks, making it an ideal solution for various LS-powered vehicles.