To Get a expression with these kinds of outsized relevance in car society, "JDM" is an acronym for a reasonably tedious phrase: Japanese Domestic Market. It refers to products built and meant for sale and use in just Japan (i.e., not for export). This contains almost everything from autos such https://elevemotors.com/product/jdm-mitsubishi-turbo-4g63t-engine-for-sale/