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This is a Gates water pump for classic Buick Nailhead engines, specifically the 401 and 425 cubic inch models from 1962 to 1966.

It's designed for cars with air conditioning, so if your Electra, Wildcat, Riviera, or GS 401 has AC, this is the right one.

It's a direct replacement with a single outlet.
The housing is made of new extruded aluminum (not cast), and the impeller is an improved composite 5-vane design for better flow.
It's belt-driven and meets OE specs.

The part numbers are 56358119, 58-119WAW, and it supersedes 2563 and 58109.

It's new, bulk packaged, and ready to install.

If you're rebuilding a Nailhead, don't forget the water pump.

4.2 out of 5