After installation was complete, we took the Street Bob to HB Hogs & Choppers for some dyno runs. The baseline run produced 66.56 hp and 84.84 lb-ft of torque. With the new Screamin' Eagle components, the Street Bob achieved 75.31 hp and 89.81 lb-ft of torque. That's a gain of 8.75 hp and 4.97 lb-ft of torque. For an installation that took about 30 minutes and with a pricetag under a grand, 9 hp and 5 lb-ft of torque is a pretty substantial gain for the dough. Check out hotbikeweb.com to hear how the pipes sound.