Alumatub (Part 5)

With only two weeks to go, the crew throws things into fifth gear, even avoiding a few last-minute potholes — like a too-small manifold that won't fit on the custom-built engine. But when the 'tub suddenly loses all oil pressure on the morning of its big debut, Boyd nearly blows a gasket. With everything on the line, the guys will have to push themselves like never before to get the Alumatub to the finish line.