King Racing Fiesta ST180 Main Bearings

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.
 
TECHNICAL FEATURES OF KING RACE BEARINGS.
 
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
 
PmaxBlack
24% greater load capacity
17% more fatigue resistance
Compatible with all crankshafts
pMax-Black combines a unique tri-metal structure with advanced surface processes to deliver superior load capacity
 
Elliptix
Increases oil passage capacity
Produces higher oil supply reliability
No need for custom-made oil hole enlargement
 
U Groove
Better load distribution across the bearing surface
A more stable hydrodynamic lubrication regime
Greater bearing durability at high RPM's
 
Radia Lock
Optimal press fit
Improves bearing spin and fretting prevention
Better heat transfer
Reduces bearing and housing distortion
 
Eccentrix
Better oil wedge formation
Stable hydrodynamic lubrication regime
Minimised vibration and wear
Prevention of oil film wiping in high RPM conditions
Optimal load distribution across bearing surface