S&S CYCLE Sidewinder Kit - 93" - High Compression 91-9130

If you're serious about extracting maximum displacement and power from a classic Harley Shovelhead, this S&S Cycle Sidewinder Kit delivers the displacement increase and internal durability that separates street machines from genuine performance builds. Rather than piecing together components from multiple vendors, this complete stroker assembly gives you engineered compatibility and the quality S&S is known for—meaning fewer variables, better reliability, and more time actually riding. Whether you're upgrading a 74" or 80" platform, you're getting a fully balanced, dynamically optimized engine that transforms your bike's torque curve and top-end capability.

• Expands displacement to 93"
• Alternative 96" configuration available
• 3.625" bore cylinders
• High tensile cast iron
• Forged piston assemblies
• 4.5" stroke standard
• 4.625" stroke option
• Dynamically balanced flywheel
• S&S heavy-duty connecting rods
• S&S mainshafts included
• Stainless steel head bolts
• Chromoly adjustable pushrods
• Complete gasket kit included
• Heavy-duty top motor mount
• Bolt-on installation compatible
• Made in U.S.A.