From memory only, all P-38s had counter-rotating props. The early
version the props turned "in" as in most designs today with
counter-rotating props. Most production models had the props turning
"out"...the direction that most adversely effects handling/performance
during single engine flight.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html