Doing an LS swap and need to connect your transmission? This plug-and-play adapter harness from Michigan Motorsports makes it easy! It's brand new in the package, designed to adapt a 4L60e or 4L65e transmission to work with a 4L80e setup. Part number B3100. No cutting or splicing wires – just connect it and you're good to go. Perfect for DIY builders or shops looking for a reliable, straightforward wiring solution. While there's not a ton of fluff in the description, you're getting a quality harness that does exactly what it says. Saves time, avoids headaches, and keeps your swap clean. UPC doesn't apply, but the performance speaks for itself!