This is an original GM high performance aluminum intake manifolds for Big Block Chevy engines with rectangular port heads and a Holley carburetor. The casting number is 3933163 as shown. There is no casting date on the underside and does not appear to have ever been one as shown. This is a bonus since it can be used on any engine and be correct. This is a very hard to find original GM 3933163 aluminum intake. This intake is in good original condition as shown. It is in bare aluminum finish with no paints or coatings. The intake appears to wear its original finish, not blasted, so I decided to…

This is an original GM high performance aluminum intake manifolds for Big Block Chevy engines with rectangular port heads and a Holley carburetor. The casting number is 3933163 as shown. The casting date on the underside is partially scraped off from being dragged across the ground as shown. What can be seen is 3.22. The date can not be seen when installed anyway. This is a very hard to find original GM 3933163 aluminum intake. This intake is in good original condition as shown. It is in bare aluminum finish with no paints or coatings. The intake appears to wear its original finish, not blasted, so I decided to leave…

This is an original GM high performance aluminum intake manifolds for Big Block Chevy engines with rectangular port heads and a Holley carburetor. The casting number is 3933163 as shown. The casting date on the underside is 05019 which obviously can not be seen when installed. This is a very hard to find original GM 3933163 aluminum intake. This intake is in very good condition as shown. It is in bare aluminum finish with no paints or coatings and looks more like a piece of jewelry than a mechanical part. The part number, firing order, and all important Winter's Foundry casting mark are all intact and undisturbed. I see no…