The Pro Series II has the same strength as the original Pro Series, but 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.Designed for HCR Long Travel suspension, Long Travel Industries suspension, and Madigan Long Travel suspension. 100% manufactured and assembled in the USA. Fits HCR, Long Travel Industries, & Madigan Long Travel Kit+4" over stock length300M axle shaftCVs feature 4340 chromoly body -300M internals - Inner CV plunges 2.25”33 spline 300M center bar with plunging inboard CV eliminates halfshaft pull-outDesigned 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.