If you have an engine later than 1990 with a 12A prefix engine number or SPI it is likely that you have the later type oil pipe from engine to filter head. This type has been known to leak and even pop out under arduous conditions and this replacement braided pipe eliminates this problem. Its other major benefit is that the bigger holes allow more flow of oil which can be a cheap source of more BHP and negates any need of an oil cooler under most circumstances.
Pre 1991 engines have 5/8" block union and 1/4" npt thread for the filter head.
12A engines from 1991 on have 11/16"UNF block and filter head so this kit has 2-11/16"unf unions for use with later type filter head.
These are the following options of filter/block sizes for Pipe kits:
Block union 5/8" and filter head 1/4"npt use TAM2106BRAIDED
Block union 5/8" and filter head 11/16"unf use MOC1019
Block union 11/16" and filter head 11/16"unf use MOC1018
Block union 11/16" and filter head 1/4"npt use MOC1020