ARC 4.500 Inch Enduro Billet Rod for Peak Performance Kart Stroker KitsRevolutionize your engine's output with the ARC Billet Rod 4. 500" Enduro, a cornerstone for advanced Raptor Flathead stroker projects. At this length, it maximizes crank throw, converting more combustion energy into rotational force for the kind of acceleration that leaves dust in your mirrors. Enduro enhancements make it a fortress against the rigors of maxed out builds, where every rev tests limits. The design incorporates stress relief machining