Rotating Assemblies & Stroker Kits

Increase engine displacement, build bottom-end strength, and simplify your engine build with balanced rotating assemblies and stroker kits. Comprising the entire bottom-end core—the crankshaft, connecting rods, pistons, piston rings, and bearings—a pre-matched rotating assembly ensures every component is engineered to operate seamlessly together for correct deck height, compression ratio, and rotational balance.

Whether you're carrying out a complete bottom-end rebuild on a daily driver, building a forged high-displacement stroker engine to increase torque and spool forced induction faster, or assembling a high-RPM engine for drag racing, track days, heavy diesel towing, or off-road endurance, choosing a precision-matched kit eliminates clearance conflicts and balance issues. Explore standard-stroke and stroker rotating assemblies featuring forged steel or cast crankshafts, high-strength H-beam or I-beam connecting rods, forged aluminum or cast pistons, file-fit rings, and heavy-duty performance bearings across popular domestic, import, diesel, and powersports engine platforms.