no, alot of MX3 guys do so for an upgrade. About everything is a direct bolt-on. Just do a search on a MX3 forum to see a how-to. My buddy has done in but got the jdm KLZE instead for a few extra ponniesHorsepowerFreak said:How do you figure? Engine, transmission, custom/modified motor mounts, wire harness, ECU + entire custom install? (uhm)