ZIPPERS PERFORMANCE TWIN CAM MUSCLE 124" KITS HARLEY MODELS 07-17 OPTION:TWIN CAM B SOFTAILS peaking at just over 5

peaking at just over 5

it then gets turned down to 3/8 OD leaving heavy duty 7/16 - 20 threads for the base and jam nut

and the heads will be decked

FEATURES + INFORMATION:

ZIPPERS PERFORMANCE TWIN CAM MUSCLE 124" KITS HARLEY MODELS 07-17 OPTION:TWIN CAM B SOFTAILS peaking at just over 5ZIPPERS 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.