S&S CYCLE - 91-9130 - 93” Sidewinder Big Bore Stroker Engine Performance Kit- High Compression
Whether restoring a machine to factory spec or building something better, the S&S CYCLE 91-9130 gives you a performance kit that meets the demands of serious street use. Sidewinder Big Bore Stroker Kit. Contains nearly everything needed to take a stock 74” or 80” H-D. Shovelhead engine up to 93” or 96” displacement, giving you a level of quality that holds up across the full service life of the component. Includes 3.625” bore high tensile, cast iron sidewinder cylinders and forged pistons with wrist pin and rings, a 4.5” or 4.625” stroke, dynamically balanced S&S flywheel assembly complete with S&S heavy duty connecting rods and mainshafts, S&S stainless steel head bolts, base nut, S&S adjustable chromoly steel pushrods, head gaskets, base gaskets, exhaust gaskets, and an S&S heavy-duty top motor mount. Made in the U.S.A.. Compression Ratio: 9.1:1. The 91-9130 is the kind of component that earns its place in any build or repair by doing exactly what it is supposed to, every time. Sold as a complete kit.
Features
- Sidewinder Big Bore Stroker Kit
- Contains nearly everything needed to take a stock 74” or 80” H-D. Shovelhead engine up to 93” or 96” displacement
- Includes 3.625” bore high tensile, cast iron sidewinder cylinders and forged pistons with wrist pin and rings, a 4.5” or 4.625” stroke, dynamically balanced S&S flywheel assembly complete with S&S heavy duty connecting rods and mainshafts, S&S stainless steel head bolts, base nut, S&S adjustable chromoly steel pushrods, head gaskets, base gaskets, exhaust gaskets, and an S&S heavy-duty top motor mount
- Made in the U.S.A.
Specs
- Compression Ratio: 9.1:1
- Riding Style: Street
- Displacement: 93”
- Product Name: Performance Kit
- Stroke Length: 4-1/2”
- Units: Kit
- Color/Finish: Black
- Type: Engine
- Model: Sidewinder
- Style: Big Bore
- Bore Size: 3.625”
Frequently Asked Questions - S&S CYCLE - 91-9130 - 93” Sidewinder Big Bore Stroker Engine Performance Kit- High Compression
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
