Piston Spring (Light Blue & Red) | AUC 4818 | SU Specialists

Genuine SU piston spring — Light Blue & Red. Spring weight: light/heavy combination. The piston spring controls the rate at which the piston rises in response to airflow. Spring selection affects mixture richness and throttle response — choose the correct colour for your application. Manufactured to original SU specification.

Part Number: AUC 4818