SPL Parts FKS Rear Knuckle Monoball Bushings replace the compliant rubber bushings in the rear knuckle with articulating spherical bearings, removing the deflection that lets rear toe and camber wander under cornering and braking load and keeping suspension geometry where it was aligned. Each bearing is an FK Racing unit with a self cleaning, self lubricating Teflon liner, pressed into a CNC machined 6061-T6 billet aluminum shell held to one thousandth of an inch so the housing locates precisely in the knuckle and the joint stays low friction over a long service life. The set is a complete kit for one car and is made in the USA.
Specifications
| Type | FKS series spherical monoball bushing set |
| Position | Rear knuckle |
| Material | CNC machined 6061-T6 billet aluminum shells; FK Racing spherical bearings with Teflon liner |
| Quantity | 1 kit (complete set for one car) |
| Part Number | SPL RKB S13 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1991-1993,1995-1998 | Nissan | 240SX | Base |
| 1991-1992,1997-1998 | Nissan | 240SX | LE |
| 1989-1998 | Nissan | 240SX | SE |
| 1989-1990 | Nissan | 240SX | XE |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
