Chrome Frame Mounted"Dual Cool V" 1-1/8" Oil Cooler for Harley-Davidson DUAL COOL V FINNED CHROME PLATED BILLET OIL COOLERSlim design for a custom look. Fits on all H-D models, Custom bikes. Can be adopted to fit metric cruisers. Anything with a motor, that needs cooling. Mounts with single bolt (not included) on highway bar cross bracket between down tubes. Oil cooler mount bracket detaches and flips up for two way mounting. Mounting hole: 3/8". No more overheating. Longer and better lifetime on your motor. Getting stuck in traffic - No problem! Add a piece of chrome for a fraction of retail. A must have! Doesn't just look good, works good too! It is the best flowing high performance oil cooler. Cooling tube: