S&S Cycle 106-5514 3-1/2" +.030", 80" LC Forged Pistons for 1978-'84 HD® OHV Engines Harley-Davidson® Willie G Skull Passenger Footboard Insert Kit and an expandable top for

and an expandable top for added storage space

REPLACES OEM 57100151 (LEFT) & 57100152 (RIGHT)

S&S Cycle 330-0741

Saddlemen 823-07-20906

Dark Black Smoke stops at 11"

S&S Cycle 106-5514 3-1/2" +.030", 80" LC Forged Pistons for 1978-'84 HD® OHV Engines Harley-Davidson® Willie G Skull Passenger Footboard Insert Kit and an expandable top forS&S Cycle 106 5514 These 3 1 2" +. 030" bore pistons fit 1979 '84 80" HD big twin engines, producing 8: 1 compression with stock unmodified cylinder heads.. The modern alloys used in these pistons, coupled with the advanced skirt profiles, allow them to be fit tighter resulting in low engine noise and long engine life. In the past, this could only be achieved with weaker cast pistons. S&S will fit these pistons to your existing cylinders (when