Though main muffler genuine parts is prepared previously, it bacame unnecessary for the time being. Exhaust tail pipes looked like sticked with rusting throughly and impossible to remove from muffler connections at the begining, but my desperate and consistent efforts made it possible to separate them on both sides.
New parts are not made of iron material but stainless steel special material. The oldest memory in myself 40 years ago came out the genuine standard value, setting length 170mm, the shinny pipes were set so firmly.
The coupler terminal was so fragile as to pinch to obtain enough pressure easily destroyed like decaying. The brass connector was replaced into new parts. Metal hardening phenomena must be the reason.
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