Oil Filter Adapter with Bypass Bolt-on 13/16"-16 Thread Size.
Suits Small Block Chevy 1968-99 (except LT1), Big Block Chevy 1968-89.
OEM style bypass adapter mounts the oil filter on Chevy Small Block and Big Block Chevy Mark IV engines and allows oil to bypass the filter to ensure adequate oil delivery in all conditions. Recommended for all street and most race applications.