This K&N performance gold filter fits the billet full-flow spin-on filter adapter kit, part number r10601. This filter uses a synthetic resin impregnated filter media capable of filtering lower micron particles while not restricting oil flow. Performance gold oil filters are designed to satisfy the needs of racers and engine builders as well as the average vehicle owner who wants the best oil filter available. K&N cartridge oil filters trap harmful contaminants while the filter s construction allows for high oil flow rates. All K&N oil filters are manufactured to meet stringent engineering standards. They are covered by a limited warranty to be free from defects in materials and workmanship when installed and replaced using engine and equipment manufacturer s recommended service intervals.