NEW S&S CYCLES HIGH PERFORMANCE DOUBLE VALVE SPRING KIT FROM BIG DOG MOTORCYCLES. PART # 103-000042-00.
FITMENT IS FOR ALL BIG DOG MODELS 2005-UP.
.550" lift double valve spring kit. Includes 4 inner springs, 4 outer springs and 4 aluminum top collars, 4 bottom collars. Use with stock-style bottom collar, valve guides, valves with stock 3/8" stem and stock keepers. Compatible with thin-stem valves if thicker keepers that maintain correct valve stem-top collar engagement are used.