Briggs & Stratton World Formula Kart Exhaust Header Manifold Pipe + RLV B91 Silencer 557164

Genuine Briggs & Stratton World Formula exhaust header part # 555164 with installed RLV B91 silencer (see photo).  The silencer was installed for a test and I've never been able to get it back apart, so this has been stored in our shop spares for many years.  It seems likely that it could be disassembled using heat and gentle persuasion.

Both components are used, the header is in good condition, the silencer has one small dent on the outside but is otherwise in good appearing condition.