Chevy Small Block, 1955-59 Staggered Bolt, CHEVROLET Script & Fins Valve Cove

Retail Price: $549.25
Price: $422.50 ea
  • SKU11029
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These valve covers fit Chevy small block GM cylinder heads with the staggered or offset bolt pattern. Four bolts on the perimeter of the flange hold the cover on the head. This bolt pattern was used from about 1955 to 1959.

These valve covers are larger than stock. Check for clearance for larger covers before ordering.

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 CHEVROLET 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 many roller rockers.


  • Traditional CHEVROLET script and fins
  • Heavy duty sand cast aluminum construction
  • Thick flange will not tweak when bolts are tightened
  • Staggered/offset bolt pattern for 1955 to 1959 cylinder heads
  • GM licensed

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.

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


Gaskets are not included with these valve covers. PML designed these Chevy Small Block Perimeter Mount Valve Covers to work with cork composite gaskets.

Mounting Bolt Holes

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.

Inside of Valve Covers

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 Cover Part Number 11029 compared to stock   PML Valve Cover Part Number 11029, 
compared to stock, top view
Click on image to view larger in a new tab or window.

PML valve covers are sand cast aluminum, so they have thicker walls, are taller, and have a rougher texture.

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 Chevrolet valve covers, 55 to 59 model years, size compared to die cast part   PML cast finish small block 55 to 59 Chevrolet valve covers compared to die cast part, top view
Click on one of these small images to view larger.

Read more about finishes and construction of PML parts.