Termignoni is it stainless

I have a 1200 with the large 8v exhaust looks like an 8 from the rear. The bike came with a Termignoni which I want to fit but the clamp tube is cracking up. Is the standard Termi stainless or plated? I will have to cut off the 60mm clamp and weld on a piece of tube. I did try welding up the cracks but it is thin and my welding is a bit pants. Also the pipe is stained and if the welding works I will need to polish out the mark it’s about 150mm long and all round the pipe(corrosive liquid spill maybe). So are they stainless?

Yes it's SS according to the paperwork that I got back in 2015 when I bought mine....personally I'd go for an 'expert' to weld it....I use a local guy who basically charges £30 for each item (& that's usually aluminium as I've had some broken 'used' small block gearboxes !)