Oh it looks like you have fliped polys. Im not sure why but if you mirror parts in max it sometimes flips the polys.
I have hell geting the polys fliped back in max , Use m6 to flip the polys back ,
IF the parts are seperate is export it to .mod and it will make a .mod with those seperate parts not a brk mod but a mod that parted out , then i use m6 model editor to flip the polys by useing the rewind option.