EFI 24x™ 1985-1992 Camaro/Firebird

Plug-and-Play harness assemblies for GM 12200411 PCM and Holley HP ECU. These harnesses are built to order and provide easy integration into your F-Body.

EFI 24x™ 1993-1997 Camaro/Firebird

Genuine, EFI Connection built, engine wire harness assemblies for our EFI 24x™ conversions. Our 1993-1997 Camaro and Firebird plug-and-play engine harnesses are a direct replacement to the original LT1 engine wire harness when using the 1999-2002 Gen III LS-Series PCM.