The King CR4209XP STDX is an XP-Series tri-metal connecting rod bearing set engineered for the Toyota 3SGTE 16-valve 2.0L engine. Sized at STDX (.001" oversize clearance), these bearings are purpose-built for high-load, extreme-performance, and endurance racing applications where standard bearings fall short.
About the XP-Series:
King's XP-Series represents the top tier of their performance bearing lineup. Tri-metal copper-lead construction delivers superior load capacity over bi-metal designs, making these bearings ideal for boosted, high-revving, and race-built engines running forged or steel crankshafts. The XP-Series features enlarged and chamfered oil holes for improved lubrication, and is specifically designed to accommodate cranks with large radii (narrow rod bearing applications).
Key Features:
- XP-Series Tri-Metal Construction — Copper-lead composite for maximum load capacity in extreme performance environments
- STDX Sizing — Standard journal diameter with .001" additional clearance, ideal for performance builds requiring slightly looser oil clearance
- Enlarged, Chamfered Oil Holes — Promotes consistent oil flow to the bearing surface under high RPM and load conditions
- Advanced Geometry — Optimized eccentricity and crush height engineered through elasto-hydrodynamic analysis
- Engine Set — Sold as a complete connecting rod bearing set for the 3SGTE engine
- Compatible with Large-Radius Crankshafts — Designed to work with narrow rod bearing journals common on performance applications
Understanding King Part Number Suffixes:
- CR — Connecting rod bearing set
- XP — Tri-metal copper-lead extreme performance series
- STDX — Standard crankshaft journal size with .001" extra oil clearance (X = +.001" clearance over STD)
Undersize vs. Oversize Explained: The term "Undersize" (e.g., .010", .020", .030") refers to a thicker bearing shell intended for use with a crankshaft that has been machined undersize. "Oversize" or "X" designations indicate a thinner shell that provides increased oil clearance over the nominal standard — not a physically larger bearing.
King Engine Bearings has been a specialist bearing manufacturer since 1960, offering a complete range of bearings for performance, racing, and OEM applications across automotive, marine, and motorsport platforms.