JDM means a car or truck built for sale while in the Japanese Domestic Market place (i.e. anyone went into a showroom in Japan and bought the vehicle)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 stands for Japanese D