High-performance Polini Big Evolution air filter engineered for maximum airflow and engine responsiveness.

Dual-layer open-cell foam construction delivers superior intake surface area, enhancing cylinder filling and overall power delivery. The straight 55mm connection accommodates PWK carburetors 32–36mm, with included adapters (28/35/42/46/50/55mm) ensuring compatibility across Dellorto, Mikuni, Keihin, Gurtner, Polini, and OEM carburetor platforms.

Optimized for racing and high-performance applications where airflow efficiency directly impacts throttle response and acceleration. The expanded foam matrix reduces intake restriction while maintaining filtration integrity. Includes six adapter sizes for universal fitment.

Note : Measure connection diameter at the carburetor; rubber mounts compress slightly during installation, so actual diameter may be marginally smaller than specified.