CONCORD, NC - Just as a point of clarification regarding the LO206 exhaust systems -- per 708.2.1 -- only the RLV # 5506 and RLV #5507 are legal -- the pipes are to be run as manufactured with absolutely no alterations or modifications. This means no bending, no twisting, etc. -- This rule is valid for all classes / all divisions running the LO206 engine