Radium Engineering Competition Catch Can Extension UpgradeRadium Competition Catch Can Extension Upgrade This extension is a volume upgrade specifically designed for customers who have the Radium Competition Catch Can short version (20 0072). The O ringed anodized aluminium extension section screws into the centre of the existing catch can body, increasing the total capacity to 1 quart ideal for high power or endurance applications where extended drain intervals are required. The Radium logo is laser etched