Fourpiston

Fourpiston is a name used by multiple entities in the automotive and mechanical design sectors. There is no single, widely recognized company under this name, so references to Fourpiston typically pertain to either a brake component concept or to various boutique brands that have adopted the name.

In braking technology, four-piston calipers describe a class of hydraulic brake calipers that house four pistons, typically two or more per side, to apply the brake pads. Four-piston arrangements provide greater clamping force and often improved pad contact area compared with smaller-caliper configurations, enabling higher braking performance on larger rotors or high-performance vehicles. They are used in automotive and motorcycle applications, with designs ranging from fixed calipers to floating assemblies and various material choices.

In branding and product naming, Fourpiston has appeared as the name for makers of performance car parts in different regions. The exact scope of these entities varies; some focus on brake systems, others on wheels, body components, or bespoke engineering parts. Because multiple companies may use or have used the name, any single reference should be verified for its specific products and origins.

Notable related terms include four-piston brake caliper, which describes the general hardware concept, and piston as a core component in hydraulic braking systems.