Precision Made in USA for exact fit and outstanding performance. Twin Power Oxygen sensors are precision made for outstanding performance. They feature extra-high temperature dual-shield ends and are direct fit. No modifications are needed! Meets O.E.M. specifications.ISO 9001 and TS16949 certified manufacturing plantBest consolidation: fewer SKUs for more coverageExtra high-temperature dual shield endsImproved engine performanceMeets O.E.M. specificationsReplaces H-D 27729-10Best coverage