Technical Exhaust Diameter Help

[TigerTom]

Stuck at work.

Does anyone with access to e learn or drawings know the outside diameter of the 1.2L 8v exhaust pipe.

I got a new centre pipe and chopped the exhaust. Slit both pipes and shoved together.

I'm having trouble getting a gas tight seal and getting the back box aligned to stop any rattling as the joint is too tight.

I'm going to buy a coupler like the one below instead, but I need an outside diameter to buy the right one.

Exhaust Pipe Connector Steel Tube Clamp with Screws Adapter Sleeve Joint Coupler (40mmx44.5mm-90mm): Amazon.co.uk: Car & Motorbike

Thanks as always,

Thomas