Aluminum & plastic don't last as long as an original Mitsu brass 'n copper radiator & can't easily be rebuilt ~ I used a DIY car wash pressure wand to bend several fins like a dummy but the truck keeps cool still, looks to be an original radiator probably... I'm too lazy to phone 'n verify stock BUT one of the various links in this thread supposedly has the right stock 2 row brass copper 4X4 radiators ~ according to that YouTube video a gen 1 Montero radiator fits MM & Ram50 with minimal tweaking ?!?