Crane FireBall® HI-4 performance ignitionss easy to install! Mounts in place of the stock module with plug-in installation. True Single-Fire! Crankshaft position sensor is used to establish accurate firing. Ten advance curve families! Easily selected via rotary switch. Lets you select the exact advance curve you want for factory stock to wildly modified engines for maximum horsepower, torque and reliability! Fits Carburetted Engines only. . 53-620: 1995–Up Evolution with 8-pin connector. And 1994–'97 Sportster models.

Crane FireBall® HI-4 performance ignitionss easy to install! Mounts in place of the stock module with plug-in installation. True Single-Fire! Crankshaft position sensor is used to establish accurate firing. Ten advance curve families! Easily selected via rotary switch. Lets you select the exact advance curve you want for factory stock to wildly modified engines for maximum horsepower, torque and reliability! Fits Carburetted Engines only. . 53-620: 1995–Up Evolution with 8-pin connector. And 1994–'97 Sportster models.