free flowing design can add two to five horsepower

It works for custom clutch or brake applications

166:1 gearing ratio

Performance Drilled Design: The drilled pattern provides better braking in wet weather

and clears the fuel tank easily

HI-4N Ignition Module Kit - 1970-1999 Harley-Davidson Big Twins 1971-1990 XL Subcategory_Sissy Bars free flowing design can addHI 4N Performance Ignition Kit with HI 4N Ignition, Single Fire Coil, and 8. 8mm double silicone, premium quality spark plug wires for 1970 1999 Big Twins. See Additional Information for fitment. Updated version of the popular Crane HI 4 ignition More power than the stock ignition Single fire and dual fire function built into a single module All metal housing provides improved heat dissipation Ignition advance and timing degree markings are on the