The Porsche 997 Turbo Manual direct bolt-in 1000HP Level 5 axles. These axles are a direct bolt-in, featuring 108mm inner and outer CVs' with our exclusive aerospace grade internal cage and race set, with a bolt-on outer stub to fit the factory wheel hub. The center bars are our high-grade aircraft quality torsional center bars that twist more than a factory unit absorbing a great deal of the shock factor and are made with 30 splines, upgraded from the factory 28 spline size. Rated to 1000HP with a 1-year warranty. Price listed is for both axles.