RCV Ultimate 934 CV joints are an industry leader in high strength and reliability. 100% made in the USA. The housing, bearing cage -race have an isotropic finish for reduced friction. The SI21VL-35 plunging 934 CV features a solid 4340 body for strength, 4340 cage, and 300M race. All CV joints are "race prepped" for maximum performance and longevity.Backed by RCV's "No Questions Asked Limited Lifetime Warranty" against breakage. Black Oxide coating standard. Optional nickel plating is available for extra corrosion resistance. *photo may not directly represent the product