Hey guys, recently my car had no more brakes so i looked under the car to found out that all my underbody lines are corroded so i'm planning on changing them all. I know the brake lines are 3/16 th of an inch but i'm not sure of the fuel feed line, return line and vapor pipe size. I tried to measure them but i'm not sure if i'm right, i got 1/4" for the return and vapor and 5/16" fot the feed line, is that right?? Also may i use a double flare coupling in a fuel line if i dont want to cut it all the way to the fuel filter or is it illegal? thank alot guys

Matt

 

anyone changed these before?