Move a way from the flex pipe sir.
Unless your talking the expensive stainless weaved flex? I have used these with excellent results. Just for that little bit of give in the system. Especially at the down tube, right before the "H" pipe. You only need one.
Something like this.
Exhaust Flex Pipe Stainless Steel Double Braid 3" x 6" w/ Ends 10" OAL 30006DN | eBay