Twin Air releases an oil cooling system like none other on the market! Twin Air's Oil Cooler's unique tubular heat exchanger cools the oil by running the oil through the tubes via a 3 chamber element. The 6mm ID rubber hose was their choice to maximize heat exchange and maintain optimal oil pressure. The Twin Air Oil Cooler is mounted behind the left side radiator and comes with all the necessary hardware for mounting. Tested by Motocross MX1 Team Kawasaki in the 2009 FIM Motocross MX1 Championship. For Honda CRF 450 (2009-2012).