Cast iron toilet waste pipe. Needs to be cut down?

[Owen42]

Hi I need to this cast iron pipe back as my new back to wall toilet won’t fit otherwise. Cutting it back i am going to lose the collar. So what fitting can I get for it I would like a flex as it will easier for me when installing the new toilet

 

[ShaunCorbs]

Straight Flexible WC Connector

97-107mm Inlet x 3½"/90mm Outlet Flexible WC Connector

mcalpineplumbing.com

 

[shrenikdoshi]

Use ss 304 forged fittings...(connector)