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

OBS:No studs

3mm nipples as used on H-D® models

With fork lock set

Fits: > Round tubes

PS 'MODEL 412' SHOCK 11.5 INCH 1973-08 sving Designed for use in custom412 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