520 FB ChainThis is the top of the line; the strongest, most durable sealed chain that we offerFB = Fine Blanking, an incredibly precise manufacturing process that yields perfectly cut linksTight tolerances make the plate, pin, and bushing union accurate and strongDue to the accuracy of the cuts and the use of stronger alloyed steel, the FB has our highest tensile strength rating, nearly 8,000 lb.Special sealing rings are chemically treated to gain strength and reduce frictionThe FB treatment allows the O-rings to be impregnated with greaseFB rings are stronger and more durable than X-rings, with significantly less frictionGold links and rollers, silver inner plates, pins and bushingsClip-type connecting link includedRecommended for applications 450cc and aboveReplacement connecting link available
