S&S CYCLE Evolution Big Twin Engine Case with 4.000" Bore - Part 31-0047 Stands Rolling pins reduce resistance for

Rolling pins reduce resistance for smoother engagement and stronger power delivery

XL models with wire spoke wheels

Ensure these modifications are accounted for during your custom build

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S&S CYCLE Evolution Big Twin Engine Case with 4.000" Bore - Part 31-0047 Stands Rolling pins reduce resistance forEngine Case +4. 000" Bore Special Application Evolution Big Twin The S&S CYCLE 31 0047 engine case is engineered for high performance Evolution Big Twin motorcycles, offering a custom fit for cylinder bores up to 4. 000 inches. Crafted to accommodate larger stroke lengths of up to 5. 000 inches, this case features a moved outward cam chest by 0. 250 inches, providing enhanced clearance for performance builds. The design ensures optimal oil scavenging