I've had my entire exhaust system on and off several times, and swapped from the Yamaha/Akra back end to an MTC single can, without replacing any of the gaskets in the Y-piece. They look a bit flaky, but still seem to seal OK

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I spent a lot of money on travel and racing motorcycles - the rest I just squandered.

XT660Z - Commuter, Adventurer...Racer?

www.dashmoto.net

Other bikes >> MT-03 / CG125BR-J / ER-6F
Departed >> ZXR400L3 / EC300 / DR-Z400E / DR800S / GPZ500S / GS400