The Singapore scenes were shot on Hotel Street in downtown Honolulu. At the end of the show, the temple in Manila is actually the Bodo-In temple at the Valley of the Temples in Kaneohe, Hawaii.
The Singapore cop's white car is a mid-1960s Nissan Bluebird, known in the USA as the Datsun 410.
The Car that McGarett hot-wires to escape the bad guys is a 1961 Cadillac.