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Chevy™ Small Block, 1955-1959 Staggered Bolt Pattern, CORVETTE® Script and Fins Valve Covers

Part Number 11027

PML 55-59 Corvette Small Block Valve Covers, As-Cast FinishPML GM Licensing Stamp PML 55-59 Corvette Small Block Valve Covers, Black Powder CoatedPML GM Licensing Stamp PML 55-59 Corvette Small Block Valve Covers, Orange Powder CoatedPML GM Licensing Stamp PML 55-59 Corvette Small Block Valve Covers, PolishedPML GM Licensing Stamp
As-cast finish
$250 (set of 2)
Go To Cart
Black powder coating
$400 (set of 2)
Go To Cart
Chevrolet Orange powder coating
$400 (set of 2)
Go To Cart
Polished finish
$475 (set of 2)
Go To Cart

Dimensions: Click here for dimensions in a pdf file. A separate window will open and load the file.

Finishes: Read about finishes and construction of PML parts.

These sand cast aluminum valve covers feature raised CORVETTE script lettering and 7 fins. They have perimeter mounting with staggered or offset bolt holes for 1955 to early 1959 cylinder heads. The mid height design clears most roller rockers.

These valve covers do not have a provision for PCV, breather or oil fill because the original valve covers did not have a provision for PCV, breather or oil fill. This was done in the intake manifold.

The holes to mount the valve covers on the engine are about 8.8 inches apart (center to center) on the intake or inside edge and 10 inches a part on the exhaust or outside edge.

Please check dimensions in above link to verify clearance for your application.

Interior is open, same as stock covers.

inside of valve cover
Picture shows the inside of the PML cover. Click on image to view larger.

PML Valve Covers Compared to Stock

PML Valve Covers Part Number 11027 height compared to stock  PML Valve Covers Part Number 11027, compared to stock
Click on image to view larger.

These images show a PML valve cover compared to the stock cover. The outside dimensions are shown. The distance to the gasket surface maybe different. See the link below the "Buy Now" button for more information on dimensions.

Many original valve covers were die castings or stamped steel. Both have a smooth surface.

The images below show this PML valve cover compared to a typical die casting, GM part 3726086.

PML cast finish small block Corvette valve covers, 55 to 59 model years, size compared to die cast part   PML cast finish small block 55 to 59 Corvette valve covers compared to die cast part   PML cast finish small block 55 to 59 Corvette valve covers compared to die cast part, top view
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PML valve covers are sand cast aluminum, so they have thicker walls, are taller, and have a rougher texture. The classic CORVETTE script is a General Motors Trademarks used under license to PML, Inc.

Read more about finishes and construction of PML parts.

For a larger picture, please click one of the above images. A separate window will open showing a bigger picture. (The larger pictures take a minute to display.)

PML Valve Cover Features:

  • Strong sand-cast aluminum construction
  • Thick side walls and gasket flanges that will not bend when bolts are tightened
  • Mounting hardware included

Learn more about finishes and construction of PML parts.

General Motors Trademarks are used under license to PML, Inc.