Radium Vented Fill Neck Cap Only BMW-E46 M3-2006 This kit is the adapter

This kit is the adapter sleeve only — select your pump from the compatible list below

This professional-grade gauge features a silicone-filled dial with acrylic lens

Compatible with fuel system components

there is no universal size compatibility guide — refer to the product images for retainer dimensions to confirm compatibility with your specific fuel lines before ordering

Radium Vented Fill Neck Cap Only BMW-E46 M3-2006 This kit is the adapterReplacement vented fill neck cap engineered by Radium Engineering for fuel filling systems. This professional grade cap provides a secure, leak free seal for fuel fill necks while allowing proper venting, complete with FKM Viton O ring for reliable sealing. Compatibility Compatible with Radium Engineering 20 0197 V Key Features Vented design for proper fuel tank venting FKM Viton O ring included Secure, leak free seal Professional grade motorsport