I got my Viper 2's today and already have them and the fuel controller installed on the bike. Took me about 1.5 hours to get the stock exhaust off and the new exhaust put on. The fuel controller really was "plug and play." It has 4 connectors and 1 ground. I have to run out and get a 45 degree socket to tighten the nuts up (can't find mine), so I will take a few pics when I get back. Looks and sounds Awesome!!!!! Predators video does not do these things justice. They sound sooooo much better in person.