Hello, happy 4th!

As title says I have STOCK 1JZ SC300 right now with an open down pipe that looks something like this:







I'm getting ready to put the rest of the exhaust on, I have the muffler and and cat back pipe I just need mid - pipe and flex brad.

1. My question is what size Flex braid is good (length) and can anybody recommend me one?
2. Also next is if I buy 3" stainless pipe will a welder be able to bend it to accommodate the angle from the open downpipe or do you I need to buy an angled one?
3. I also Need those two-bolt 3" Gaskets for the pipes + bolts 4 - 6 would be good, what material is best? copper graphite etc.