your best bet if your 626 came with a v6 is to order a jdm KLZE...its rated at 200flwhp and is a direct drop in. Any shop can do this or if your mechaniclly inclined you could do it yourself...don't buy an mx6 motor for your 626. The standard motor in mx3's are the 2.0 4cyl and the 1.8 v6. You can find the klze at any import site that sells jdm motors....