DID 520VX2GB-RIVET-CL Gold Rivet-Style X-Ring Chain Connecting Link D.I.D.'s Pro-Street 520VX2 X-ring chains are high-quality X-ring chains with excellent wear resistance Maximum engine displacement - 750cc Tensile strength - 8210 pounds Projected wear life 35.0 times longer than a standard chain under similar conditions New X-rings included