Mercury - Single Engine Helm Kit GPS and Helm Harness 8M0208458. OverviewThis kit is an easy way to get a single-engine DTS helm set up without hunting down separate pieces. You get the GPS feed and the helm harness together, so the wiring ends up cleaner and a lot less confusing. It's a nice option if you're trying to keep the dash area simple instead of stacking extra parts behind it. Overall, it just makes the install feel more straightforward.. Key Features • GPS Included - Supplies the posi