King XP series race main bearing set for the Nissan SR20DE and SR20DET 2.0L DOHC 16-valve engine, turbo included. King describes XP as a tri-metal lead bronze layered material with a nano-scaled hardening process applied to the Babbitt overlay, rated to withstand 10,200 PSI - that overlay is what lets a race bearing tolerate the load spikes and the momentary metal-to-metal contact a boosted SR20 puts through the mains. The set is supplied as King's Race pMaxBlack construction.
This listing is the STDX (StandardX) size. King catalogues STDX as a size in its own right, separate from plain STD, in the same MB5243XP family that also runs to 0.25mm, 0.026in, 0.5mm and 0.025in undersizes. STDX is ordered against a standard-diameter journal, like STD, but is a distinct King size code - it is not an undersize and it is not interchangeable with STD by name alone. King does not publish a numeric wall thickness or clearance figure separating STDX from STD, so we are not quoting one. Measure your journals and your target clearance, and contact us if you need us to confirm the size with King before you order.
- Set contains 5 pairs - 10 individual bearing shells - covering main positions 1, 2, 3, 4 and 5
- Fits Nissan SR20DE and SR20DET, 2.0L DOHC 16v, including turbo
- King XP series: tri-metal lead bronze layered material with nano-scaled hardened Babbitt overlay
- King rates the XP material to withstand 10,200 PSI
- Race pMaxBlack construction
- Size StandardX (STDX)
Specifications
| Type | Performance main bearing set |
| Bearing Size | StandardX (STDX) |
| Set Contents | 5 pairs (10 bearing shells), main positions 1-5 |
| Material | XP tri-metal lead bronze with nano-hardened Babbitt overlay (Race pMaxBlack) |
| Load Rating | 10,200 PSI (King XP material rating) |
| Engine | Nissan SR20DE / SR20DET, 2.0L DOHC 16v, incl. turbo |
| Part Number | KINGMB5243XPSTDX |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1991-1996,1999-2002 | INFINITI | G20 | Base |
| 1994-1996,1999-2002 | INFINITI | G20 | T |
| 1995-1998 | Nissan | 200SX | SE-R |
| 1991-1993 | Nissan | NX | SE |
| 1991-1993 | Nissan | NX | XE |
| 1998-2001 | Nissan | Sentra | SE |
| 1991-1994 | Nissan | Sentra | SE-R |
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
