Just did my 21st Striper , 16ft length hoses was more than enough so can't see yours being more. Mssg **** Happens on this site , Seth will know and give ya a great deal on the hoses or what ever else u need with Seastar .
Just a note, first and foremost make sure u can remove and have enough room to put the new support rod in or you'll have to remove and raise you engine to get it in or do some fiberglass cutting like I found out I had and did, not fun, but got it done. If u want I posted some of my experiences on a post called "seastar" and also "what you do to your boat this week end" . Good luck