My friend Wally wanted to stroke his knucklehead motor . . . and thought he'd try the Truett & Osborn Kit. You get the flywheels(stroker), I-beam rods, quality cast stroker pistons, all assembled and balanced. We stuck 'em in the truing stand to check 'em out - and they're nice and perfect. I was impressed with the quality, fit and finish. Jim's shafts. Nice package.