+7% flow over Standard Super E

110" limited edition anniversary S&S 110SE engine

' It allows this filter to keep-up with air-demands from bone stock all the way up to massive horsepower spitting engines

fits all stock H-D Keihin CV carbs

PS, 412 series shock set. 12.5". STD/Heavy Duty. Black 1980-08 Motor & Förgasare +7% flow over Standard SuperDescription 412 series shocks: Best value Progressive Suspension shock, great as stock replacement. Nitrogen charged double steel wall body. Multi staged velocity sensitive valving. Five position cam style preload adjustment. Note: Black 412 shocks may be supplied without lower cover. What are Progressive Suspension's 'Heavy Duty' shocks? If you are a lightweight rider with a lightweight passenger, STD Duty is probably your best choice, heavy duty