ProTek RC Aluminum "Elliptical" Samurai 321B Carburetor Restrictor (6mm)

The ProTek RC Aluminum "Elliptical" Samurai 321B Carburetor Restrictor uses a unique oval-shaped venturi to tune airflow into the engine. This 6mm restrictor is designed to provide smooth bottom-end power with a progressive power delivery that increases as RPMs rise.

Changing the venturi size can help fine-tune engine power delivery and run time for different track conditions. This restrictor is compatible with Samurai 321B, OS V-Spec, Novarossi and RB carburetors.

Replacement restrictor o-rings are available separately under part number PTK-2517. ProTek RC also offers the Elliptical Restrictor Set under part number PTK-2525-COMBO.