Don't know the exact lengths, but I do know they are in several sections. It's a 3/8" feed line and 5/16" return line. It uses some sort if compression with an o-ring seal. The engine is one section, theres a section from the tank to the filter, then from the filter up to the back of the engine. The lines were actually the same for all engines to the back of the engine(the diesel lines had a pump where the gas lines had a filter). Your best bet to find them will be a junk yard as the early tbi's used the braided lines whereas later models used just a steel hard line.