FAST™ PERFECT CIRCUIT WIRING HARNESSES FOR BIG BLOCK CHEVROLET

FAST™ Perfect Circuit™ EFI Wiring Harnesses for Big Block Chevy are fully pre-assembled and tested, making it easy to install a factory-configuration GM crate motor or EFI motor from a donor vehicle. Perfect Circuit wiring harnesses feature all OEM-style connectors, high temperature oil resistant wiring and puncture-resistant outer sheathing for years of dependable service. All connections are butt connected, crimped, and soldered for maximum mechanical and electrical integrity.

Like all other FAST™ wiring harnesses, these harnesses feature clearly labeled connections, making them simple to install and vastly superior to trying to make sense of a confusing, unlabeled factory harness. So if you’re trying to follow the old engine swapper’s adage of “making the engine think it’s still in the vehicle that it came from” a Perfect Circuit™ wiring harness –available only from the EFI experts at FAST™, is the only way to run! Check below for a chart that details the Perfect Circuit ™ wiring harnesses that are available for Big Block Chevy EFI motors. Further questions about our wiring harnesses? Simply Email us, or contact EFI HELP™ at 877-334-8355.