These adapters are designed to use the common BBC electric water pump on a LS engines
Made in the USA from 5/8" thick aerospace grade billet aluminum
Includes: Bolts, Gaskets, and 2 adapter plates with -12 ORB
On the top 2 holes of the adapter plates, these 2 holes use -12 ORB threaded fittings and should be combined with a "Y" block then transferred to the radiator