JDM means a car or truck designed for sale within the Japanese Domestic Market (i.e. anyone went into a showroom in Japan and acquired the car)Tags: 13b engine for sale, 13b engine for sale japan, 13b rew engine for sale, 13b rew for sale, 13b rew motor for sale, 13B TWIN TURBO engine for sale, rx7 13b motor for saleJDM generally refers to cars, bu