What size is C43 exhaust? Need SS flanges

[noogieman]

I need to pick your brains for valueable info.

I need stainless steel flanges.
How many flanges are there on complete exhaust?
6 or 8 flanges?

# How many flanges do I need to buy if I only remove my centre resonator?
# How many flanges do I need to buy if I remove resonator and 2ndary cats?

Is it an 2 inch or 2.5= (63mm) or 3= (76mm) inch pipe size?

I found some flanges on Ebay, but I'm not sure what size flanges I should get?
2 or 2.5 inch flanges?

2 bolt holes are they correct for C43?
I've seen flanges with oval drilled bolt holes?
Don't know what to buy??
Please advise.

Linked flanges are they correct fitment for my C43?
2.5 inch 63mm flange
Exhaust 2 Bolt Flange 63mm 2.5 " Diameter Stainless Steel | eBay

3 inch 76mm flange
Exhaust 2 Bolt Flange 76mm 3" Diameter Stainless Steel | eBay

Thanks for your input