S&S Cylinders

43 products — part of all Cylinders

When a Harley-Davidson engine is being built for more displacement and stronger performance, the cylinder is where that ambition takes physical form. S&S Cycle produces cylinders engineered to deliver genuine power gains on real-world Harley-Davidson platforms, with fitments covering Evolution Big Twin engines from 1984 to 1999 and Milwaukee-Eight 114-inch applications from 2017 to 2025, including stroker configurations that push displacement well beyond the factory specification. S&S cylinders are cast and machined to tolerances that support ported heads, aggressive cams and high-compression pistons — components designed to work as part of a complete performance build rather than a bolt-on guess. For riders who want more from their Harley-Davidson without sacrificing reliability, S&S brings decades of engine-building expertise to a critical component where quality directly determines the outcome. At Iron City Motorcycles in Leeds, our technical team can advise on S&S cylinder options for your engine platform and build goals. Browse the full S&S Cylinders range below.