"Left" CRANKCASE Only for 1937 - 1948 UL & ULH

H-D #406-37 (24536-37)
Brand New Production! Looks like a "NOS" * Part
UL MOTOR CASE - Left Side
Replica of OEM for 1937 - 1948 Harley UL & ULH Motors
Comes with blank VIN pad
Main bearing bore is a cast-in steel insert
Case is machined to use the later 1940 - 1954 type Bearing Race
The cylinder deck, bore, motor mounts, and the main bearing bore are all left with .040-.060 of extra material so Case can be perfectly matched machine to your original Right Case
Case is made from strong 356 aluminum alloy, which has been heat treated to T6 specifications