Superior Air Parts Inc. manufactures OEM engines and FAA-approved replacement parts for Lycoming and Continental aircraft engines. Products feature roller lifter technology, proprietary ESR (electro slag remelt) crankshaft balanced to within 1/4-ounce-inch, and tuned induction sump design. You can build it yourself at Superior's Build School. It offers offers 3-year warranties on XP Series Engines. For more information visit www.superiorairparts.com or call (972) 829-4668.