Radiators... Something you'll find you need to keep your motor running cool. The biggest hurdel you'll have is what kind of Radiator, or where to place them. I found cheap Goldwing Radiators on Ebay and figured if 1 Wing Radiator will cool a 1000CC motor than 2 should cool a 1800CC Subaru. Two of these early Goldwing Radiators have done a good job of cooling our motors when mounted in the wind. They are not the prettiest item but they do the job. The key to proper cooling is to get enough air through them. I find this works as well as could be expected.