Proflow's LS Standalone Wiring Harness kits offer the best in aesthetics, weight savings, and reliability.LS engine swap is a no-brainer when it comes to adding some affordable horsepower to a project car, but any swap comes with its share of headaches, including wiring. That's where Proflow's engine and transmission wiring harness comes in. It is designed for engines from '09 - '14 LY6 and L92 drive-by-wire GM trucks with T56 manual transmissions.