We take a stock 2021 H-D Street Glide Special and add a whole lot of H-D’s parts and accessories, like this 131ci Harley-Davidson engine. We chose many parts from the Endgame P&A collection form and function. The motorcycle also received some performance gains from our new 131ci Harley-Davidson engine and the Screamin’ Eagle intake and exhaust.
Once our Technical Editor Danny “Motor Witch” Wilson finished the customization, we put the bike on the trusty V-Twin Visionary Dyno. That’s where we discovered just how much power the Screamin’ Eagle parts made over the stock V-Twin engine.
We then also installed a complete Harley-Davidson/Rockford Fosgate OEM Stage Two audio system. The system upgrade makes a huge difference in both power and sound quality over the stock setup. After that we hit the road to actually enjoy all the massive amount of performance and audio upgrades to this now magnificent motorcycle. Find out more on the Big Twin powerplant here.