im gonna have to agree with Mazda4ever. the swap from a I4 to a V6 KLZE would be too expensive and a big headache as well. you would have to make new motor mounts for the V6 to mount up on. you would as well have to change the ECU and so many other things. better off saving yourself the money and buying a V6 straight up KLDE or KLZE. KLDE to KLZE isnt that bad as if trying to get that I4 out.i have a 93 mx6 with a V-4 and i want to put in a V-6. what do i have to do?