[Sport Flyer]

I've got a ST90 going into an GB Ultimate bipe and I need a muffler for it that'll work.

I don't know if there's a difference in with the ST 90s like there is with the 61s, , but this one has the same sized case as the 61K. The muffler bolts need to pass through the muffler and fasten to the engine.

Thanks for looking,
Kelly