A flexible self sealing or a one piece bellows-type pipe, installed between the manifold and muffler, may be used in the exhaust system for expansion and contraction purposes.
N.H. Admin. Code § Saf-C 1313.08
#4873, eff 07-24-90; ss by #6297, eff 7-23-96; ss by #8122, INTERIM, eff 7-17-04, EXPIRES: 1-13-05; ss and moved by #8248, eff 1-4-05 (from Saf-C 1312.09 )