Universal fit
No vehicle selection needed.
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
Fitment not confirmed
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
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Description
Radium O-Ring Service Kit — Standard FST (4" OD)
This is a genuine Radium Engineering O-ring service kit for the standard 4" OD fuel surge tank range, compatible with both new and old style FST and FST-R units. An essential maintenance item for any build running a Radium fuel surge tank — recommended to have on hand for scheduled servicing, rebuild, or any time the FST lid is removed and reinstalled.
Suits: Radium Engineering standard (4" OD) fuel surge tanks — FST and FST-R (new and old style)
Kit Includes:
- 16x Small O-rings for M5 bolts
- 2x Large O-rings for older style FST
- 2x Gaskets for newer style FST
Available Part Numbers:
- 20-0087 — O-Ring Service Kit, Standard FST (4" OD) — FST and FST-R compatible
Why Radium Engineering?
- ✅ Manufactured in the USA to motorsport-grade tolerances
- ✅ Genuine Radium replacement O-rings and gaskets for a leak-free FST seal
- ✅ Trusted by tuners and race teams running high-power fuel surge tank builds worldwide
- ✅ Compatible with both old and new style standard FST and FST-R units
- ✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel applications
Specifications
- Part Number
- 20-0087
- Brand
- Radium Engineering
Shipping
Orders are processed within 1-2 business days (Monday to Friday), and orders placed before 12pm AEST are usually dispatched the same day. Once dispatched, standard shipping takes 3-7 business days and express 1-3, with tracking emailed as your order leaves.
If part of your order is out of stock, we'll contact you with the option to split the shipment or hold it until everything is ready. Read the full shipping policy.
Returns
You have 14 days from delivery to request a return on unused parts in their original packaging. Refunds incur a 15% restocking fee (20% for special orders), or choose store credit and the full purchase value is applied to your account.
Parts that have been test fitted, installed, or used can't be returned, and special-order or overseas-ordered items are assessed case by case. Faulty or incorrectly supplied items are always covered at no cost to you. Read the full returns policy.