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- S&S 91-9021 cast iron cylinders for Shovelhead models are stock length and include base nuts, head bolts, and head and base gaskets
- They are 5.330" in length and are made from high strength engineering-grade grey cast iron
- They offer excellent wear resistance and a durable powdercoat finish
- Cylinders measure 3-1/2" for 1978-1984 Shovelhead 80" models
- Cylinder sets without pistons are bored slightly under nominal size and are not honed
- Fits 1978-1984 Shovelhead models