I have been using crash-bar oil coolers for years on both EVO and Twin-Cams. The commercial oil coolers offered at HUGE prices may work better, but the crash-bar is a natural heat sink, dosen't hang out in front of the motor, is pretty bullet proof and can be plumbed to show quality with the right fittings and hoses for half the price of the commercial brands. All the stuff you hear about how they get too hot to touch and will burn your feet come from people that have never tried one. The EVO is a perfect candidate for a crash-bar cooler. I got pictures and details if you want some information.