Ignition & Electrical Components for 2018+ Harley M8 Motorcycles. The 2018+ M8 Ignition & Electrical collection at TC Bros delivers high-performance components designed to enhance reliability and spark creativity in your Milwaukee-Eight-powered Harley-Davidson. This category features premium ignition switches, wiring harnesses, regulators, and more, all engineered to fit models like the Softail Street Bob, Fat Bob, and Low Rider. Built for precision and durability, these products are essential for seamless operation and customization of your electrical system. Rooted in a tradition of unique chopper and motorcycle builds, TC Bros provides best-in-class parts that not only power your bike but inspire builders to push the limits of design and individuality.