ZIPPERS PERFORMANCE TWIN CAM MUSCLE 124" KITS HARLEY MODELS 07-17 OPTION:TWIN CAM B SOFTAILS Split-cushion design has separated lumbar

Split-cushion design has separated lumbar support and forward seat cushions so they compress independently

All Moroso spark plug wires feature silicone plug boots that withstand high temperatures (up to 600°)

and the heads will be decked

peaking at just over 5

Kits include only the necessary components needed to install handlebars based on the model and height of handlebar

ZIPPERS PERFORMANCE TWIN CAM MUSCLE 124" KITS HARLEY MODELS 07-17 OPTION:TWIN CAM B SOFTAILS Split-cushion design has separated lumbarZIPPERS PERFORMANCE TWIN CAM MUSCLE 124" KITS HARLEY MODELS 07 17 EXCHANGE KITS CORES REQUIRED Zippers Muscle 124 Kit combines Big Bore with Big Stroke! At the bottom, a 4 5 8 stroke crankshaft paired with 4 1 8 cylinders establishes the base for 124 of Big Power. An engine this size needs specialized cylinder heads, Zippers ultra high flow Stage IV CNC porting with highly modified chambers along with oversize, unshrouded valves delivers just that.