3.437" Standard Bore Forged Piston Kits
- pistons are forged from hi-silicon aluminum alloy for superior strength and dependability
- the unique piston shape allows tight piston to wall clearances for quieter operation
- grooves are machined around the top ring lands to reduce detonation and improve the sealing power of the top ring
- designed for Stock stroke flywheels only
- all wrist pin holes are ream fit for a perfect geometrical surface
- enlarged valve pockets provide the clearance for larger valves and high lift cams but must be checked
- includes instructions and clearance recommendations
- 9:1 compression

Fits:
1948-1965 Harley Panhead
1966-1977 Harley Shovelhead models 1200cc (74ci)

SKU# 62131-M1

1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977