This set is an upgrade for the OEM 17900035 & 17900034 'anti-rotation devices'

Designed for use in custom applications where 2 of these coils are used for bikes with dual plugged heads (4 spark plugs in total) that run a single fire electronic ignition system

For 1 inch bars with internal throttle

Solid PTFE

but uses a regular spin-on type filter for improved filtering and fast

PS, 412 series shock set. 12". STD Duty. Black FLD 12-16 Skylthållare This set is an upgradeSpecifically designed for the 12 16 Dyna FLD Switchback. The coil spring is slightly heavier & lower coil cover is styled differently to allow better adjustment with saddlebags installed. 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