I don't run Ti anything on any cars, on or off road, unless the kit comes with it. Even then, I've replaced things with steel. Hinge pins and screws being the first. I didn't know Mugen made Ti outdrives, but I'd stay away from that too. The metal is just too soft. It is a lot lighter than steel, and a ton more expensive. Especially right now. But we're talking about a 7 or 8 pound car. A few grams arent going to be noticed.