For Just a expression with these kinds of outsized importance in auto society, "JDM" is undoubtedly an acronym for a fairly tedious phrase: Japanese Domestic Market. It refers to products built and meant for sale and use in Japan (i.e., not for export). This involves every little thing from vehicles https://elevemotors.com/product/chevrolet-gmc-avalanche-silverado-suburban-engine-5-3-v8/