- 19" / 48 cm long

Complete kit with release ramp and release coupling

All Black Diamond valves are one-piece Stainless Steel forgings with a black nitrided finish

18-21 FLSL Slim 107

Includes rocker cover gaskets & pushrod seals

PS, 412 series shock set. 12". STD duty. Chrome 1982-08 Tändkablar - 19" / 48 cm412 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 shocks will