Bearing - Main 1-2-4 Upper Std

OE Upper Main Bearing for main #1 in standard size that is the bearing that fits the block or case side, sold by the shell (not set).

Universal bearing in that it fits the intended 1997 and later 506 block engines with piston oil spray cooling and is backwards compatible with 6.2 and 6.5 blocks that didn't have piston oil spray cooling.

Part for the "select fit" process these engines were originally produced with. For information about bearing selection, refer to our TECH section for registered customers.