The Pro Series II is designed to give an alternative option to suit the needs of different applications and conditions such as mud and endurance racing.The Pro Series II features a sealed outboard CV with our new accordion style boot made from high strength materials!  Tests prove our Pro Series axles to be over 2 times stronger than the OEM shafts. Direct OEM fit replacement.  100% manufactured and assembled in the USA. Lonestar Racing MTS Long Travel Kit w/Halo 30 Locker+3.23" over stock length300M axle shaftCVs feature 4340 chromoly body -300M internals 33 spline 300M center bar with plunging inboard and outboard CV Designed for extreme racing conditionsRecommended grease: HT1LF-SPECWarranty: Backed by a 1 Year Warranty against breakage to the original purchaser. Warranty does not cover the willful destruction of product. All claims are subject to review.Learn more about our affordable Pro Series rebuild program HERE.Sold Individually** ALL UTV’S WHICH HAVE A-ARMS, RADIUS RODS, TRAILING ARMS OR ANGLES ADJUSTED OUTSIDE STOCK SPECS MUST MEASURE BIKE ACCORDINGLY AS AXLE LENGTH WILL BE AFFECTED. PLEASE SEE OUR MEASUREMENT INSTRUCTIONS.