Powerful and effective cooling system Simple installation can be completed in a few minutes with included instructions Weld free, aircraft quality stainless steel Product that will never blister, chip, rust or suffer from vibration fatigue Fans are quiet and 100% waterproof Provides the needed air flow on the hottest area of your engine's cylinders 5-1/16" diameter fans 256 cfm 3lbs 2.1oz 1-year manufacturer's Warranty