These bearings have an "X" at the end of the part number because they will provide .001" EXTRA clearance. Always consult with your machine shop before buying bearings to determine which size would be optimal for your proposed use.
Description: SUBARU WRX/STI EJ20, EJ22, EJ25 52mm rod
Bearing Types:
MB - Main bearing set
CR - Con Rod bearing set
CS - Camshaft bearing set
TW - Thrust washer set
Material construction:
HP - Bi-metal aluminum Silicon Alloy
XP - Tri-metal copper lead
Bearing Features:
N - Narrowed
D - Dowel
Bearing size inches
Dimension / Under Size e.g. "STD" for Standard, X equals .001" extra Clearance
| Bearing Size Inches | STDX | STD | .001" | 010X | .010" | .011" | 020X | .020" | .021" | .030" |
| Bearing Size metric | STDX | STD | .025 | | .25 | | | 0.5 | | 0.75 |
| Crankshaft undersize | 0 | 0 | 0 | -.010" | -.010" | -.010" | -.020" | -.020" | -.020" | -.030" |
| Additional Shell Thickness (on nominal) | -.0005" | 0 | +.0005" | +.0045" | +.005" | +.0055" | +.0095" | +.010" | +.0105" | +.015" |
Metal Structure : Tri-metal copper lead.
Race Type: Circle track, Off-road, off-shore, others that require steel crankshafts.
Engine requirements: High load - Long Duration.
HIGHER LOAD CAPACITY
The only bearing with load capacity of 17,000psi in the intermediate and 10,200psi in the overlay
BETTER FATIGUE RESISTANCE
The only bearing that goes through a hardening process creating a black fatigue resistance shield, which makes the overlay 24% stronger than any other bearing (11.5hv vs 14.5hv)
MORE ACCURACY
The only bearings with wall thickness variation of ±.0001” as a standard in comparison to ±0.00025”.
MORE CONSISTENCY
from bearing to bearing, requiring less adjustment during assembly
ONE SET FITMENT
The only bearings that don’t require you to buy multiple sets to achieve desired oil clearance
