Radium Gasket For 6-Bolt Fill Neck, 2.18" BC

Radium Gasket — 6-Bolt Fill Neck, 2.18" Bolt Circle

This replacement gasket is designed for use with Radium Engineering fuel cell fill necks. Manufactured from a premium-grade FKM (Viton) material at 1/16" thickness, it provides a reliable, fuel-resistant seal compatible with all fuel types including E85, ethanol, and methanol.

The gasket features 6 equally-spaced bolt holes on a 2.18" bolt circle diameter — confirm your fill neck bolt pattern before ordering.

Suits: Radium Engineering fuel cell fill necks — 6-bolt pattern, 2.18" bolt circle

Specifications:

• Material: Premium FKM (Viton)
• Thickness: 1/16"
• Bolt holes: 6, equally spaced
• Bolt circle diameter: 2.18"

Available Part Numbers:

• 18-0019 — Gasket, 6-Bolt Fill Neck, 2.18" BC

Why Radium Engineering?

• ✅ Manufactured in the USA to motorsport-grade tolerances
• ✅ Premium FKM (Viton) material for superior fuel and heat resistance
• ✅ Trusted by tuners and race teams running high-power fuel cell builds worldwide
• ✅ Direct replacement for Radium fuel cell fill necks — no modification required
• ✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel applications