King Engine Bearings CR4256XPSTDX XP Series pMaxBlack Tri-Metal Connecting Rod Bearing Set

The King Engine Bearings CR4256XP STDX is a high-performance, race-grade connecting rod bearing set engineered for the Dodge/Chrysler 148ci EDZ SRT-4 Turbo engine. Built under King's XP Series platform, these bearings are designed to handle the extreme loads and high RPM demands of turbocharged and competition engines.

pMaxBlack™ Tri-Metal Construction:

These bearings feature King's proprietary pMaxBlack™ overlay technology — a unique tri-metal structure developed specifically for race applications. The overlay contains 5% copper and is further strengthened by a nano-scaled hardening process that modifies the molecular structure, creating a black fatigue-resistant shield. The result is a 29% increase in overlay hardness (18.1 HV) and an overall 24% increase in load capacity up to 10,200 psi compared to conventional race bearing overlays.

SecureBond™ Structural Integrity:

The tri-metal layers are bonded using King's SecureBond™ micro-etch surface preparation process, which strengthens the adhesion between layers and significantly reduces the risk of catastrophic delamination failure under extreme loads or metal-to-metal contact events.

Key Features:

• pMaxBlack™ overlay — proprietary nano-scaled hardening process for superior fatigue resistance
• 10,200 psi load capacity — outperforms conventional race overlays by up to 24%
• SecureBond™ adhesion — maximizes tri-metal structural integrity and prevents delamination
• Bull's Eye Tolerance — shell-to-shell wall thickness matched to 0.0001" for precision fitment
• Increased bearing height — improves bore contact, heat transfer, and reduces spin potential at high RPM
• Narrowed design — clears large-radius aftermarket crankshafts
• Standard (STDX) sizing — direct replacement fit for OEM journal dimensions
• Ideal for turbocharged, circle track, drag racing, and high-load long-duration race applications

The King CR4256XP STDX connecting rod bearing set is the ideal choice for builders seeking maximum durability and load capacity in the Dodge/Chrysler SRT-4 Turbo engine platform.