Well the four door has a 3.4 pulley, shorter dog bones, colder plugs, 10.5mm wires, 180 thermostat, u bend delete, engine mount, trans mount, motor mounts, air intake, 1.0 zzp pcm tuned, and a few other things I can't think of at the moment. The 2 door is completely stock, however I'm swapping everything over to the 2 door along with proper supporting mods, full exhaust, headers, DP etc and then that one will be tuned. The motor was having issues on the four door so I replaced the motor. After the motor swap my car was spewing coolant, and trans fluid. So I gave up and bought the 2 door with a smashed front. Radiator, radiator support, ac condensor, headlight brackets, hood and bumper are coming off the four door and going on the two door. I'll slowly replace everything I take off the four door and get that one back up and running. But that one will stay stock and the 2 door will become the toy.