May incur an oversize handling fee at checkout, depending on your location. No fee for pickup orders.
Oversize Debug
Tier code
Tier priority
Tier max weight (lb)
Tier max girth (in)
Product weight (lb)
L × W × H (in)
Girth L + 2×(W+H)
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A S&S 103 in. 3-5/8 in. Sidewinder big bore stroker kit is an economical route to a larger displacement engine. This kit contains nearly everything needed to take a stock 74 in. or 80 in. HD® shovelhead engine up to 103 in. displacement.