ok in looking at the blanks and doing a hail mary guess LOL I think the spg 720 may do a 4 weight. If it was me and I was fishing brushy streams and small streams I might even drop down to the SPG601. It is only 5 ft and may not have to be cut if you wanted a 2 piece. It would fit in a car ok full length and I would think it would be a 4 weight. Once again I am just guessing. Either way what ever you buy try acidrod.com. They are not the fastest in the world of getting the stuff shipped but they do charge actuall shipping cost. the SPG601 is $8.84, the SPG 720 is $9.99 and the SPG 780 is $10.67. Another sorce is H&H one of our sponsers here. You may give Ron a call and inquire what he could get them for you for. Great team over there and a pleasure to talk to. Hope this helps and as always feel free to ask any questions you may have.