The new Perf-form Filter/Cooler is designed to stay attached to the engine, making filter changes a quick and easy task. Instead of oil running down the front of the engine after removing a stock filter, the new Perf-form HD-C2 drains the filter oil out the end of the unit located by the left floorboard or foot peg where it is easily routed to a drain pan. Just remove the canister end cap, slide out the old filter element, slide in a new one and replace the cap. This product is CNC machined from billet 6061 T-6 aluminum with U.S.-made seals and a 5-micron filter element.