These connecting rods are brand new titanium billet construction on a 5 axis CNC machining center biuild to fit the sport scout engine and replace the flimsy stock rods. The special design is a monoque design developed by Bob Nichols, from Newport Beach, CA. Bob is an old time Indian racer who has raced alomg side Ed Kretz and many others in So Cal inthe 40's. He spend many years in the aerospace industry in charge of a machine shop for a major aircraft builder and has incorporated many engineering dicoveries into designing his signature connecting rods