Pro One Black Twin Cam Universal Motorcycle Oil Cooler Gauge Kit Harley Davidson. Diameter 12" L x 2.25" Tube Size 1 1/2. CNC-machined from billet aluminum with a chrome-plated or black finish. Kits mount to frame tubes with supplied clamps and reducers. Come with AN #6 fittings (use with -6 lines found in most speed shops).Measure 12" L x 2.25" diameter. NOTE: Twin Cam models require an oil filter adapter or offset mount w/ oil line fittings. 12" L x 2.25". Twin Cam Model Requires Use Of Oil Filter Adapter. The item "Pro One Black Twin Cam Universal Motorcycle Oil Cooler Gauge Kit Harley Davidson" is in sale since Saturday, March 11, 2017. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Body & Frame\Gas Tanks". The seller is "jtscycleparts" and is located in Cobleskill, New York. This item can be shipped worldwide.