King Engine Bearings, Performance XP Series w/ pMax Coating, Rod Bearings CR6676XP (90-96 NISSAN 300ZX)

XP-Series Main Bearing Set (CR6676XP) by King Engine Bearings®. Bearing Size: Standard. Quantity of pairs in set: 4. pMax Black™ is a unique tri-metal structure for race applications. The overlay is strengthened by a proprietary nano-scaled hardening process that modifies the molecular structure and creates a black fatigue-resistant shield. Specifications: Bearing Usage: Performance Grooved Bearing: Yes Groove Location: Upper Groove Style: Full Bearing Material: Tri-metal copper-lead nickel Lining: Cu21Pb4.5Sn Overlay: Pb10Sn5Cu surface hardened Features: No more multiple set purchases or "fishing" for bearings to reach right clearance No need to grind cranks "fat" or "thin" No need to adjust housing diameter Less taper across the bearing face Better load distribution across the bearing surface A more stable hydrodynamic lubrication regime Greater bearing durability at high RPM's Increases oil passage capacity Produces higher oil supply reliability No need for custom-made oil hole enlargement Optimal press fit Improves bearing spin and fretting prevention Better heat transfer Reduces bearing and housing distortion Better oil wedge formation Stable hydrodynamic lubrication regime Minimized vibration and wear Prevention of oil film "wiping" in high RPM conditions Optimal load distribution across bearing surface Successful race engine builders are constantly pushing the limits of load capacity to new levels. Race bearings today inevitably need to match these demands with more competitive bearings. At King Racing they met the challenge with the XP high performance bearings series. The XP series is a line of bearings with advanced metallurgical and geometric technologies that meet extreme performance loads. It was developed for all performance applications that use forged steel aftermarket crankshafts and produce high loads for extended periods. King Racing’s XP series features pMax Black™, a unique tri-metal structure that is 24% harder than any other conventional tri-metal race bearing. pMax Black™ together with the XP geometric features are the ideal combination for performance racing.