This Shielded Magnetic pick-up Cable will help protect the trigger signal from the distribu-tor or crank trigger pick-up from Electro Magnetic Interference (EMI). The pick-up wires are wound together and routed through a special aluminum skinned sleeve that connects to ground. This provides a ground shield around the trigger wires. The Harness is six feet long and is equipped with matching 2-Pin connectors. Recommended with MSD Digital Ignitions and aftermarket EFI racing systems.