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Chevrolet® 396, 427, 454, & 502
Big Block, Raised CORVETTE® Script
Tall
Valve Covers

P/N 11042

PML Big Block Chevy Tall Valve Covers with CORVETTE script and fins, As-CastPML GM Licensing Stamp
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PML Big Block Chevy Valve Tall Valve Covers with CORVETTE script and fins, Black Powder CoatedPML GM Licensing Stamp
PML Big Block Chevy Valve Tall Valve Covers with CORVETTE script and fins, Orange Powder CoatedPML GM Licensing Stamp
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PML Big Block Chevy Valve Tall Valve Covers with CORVETTE script and fins, PolishedPML GM Licensing Stamp
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As-cast finish
$325.00 (set of 2)
Go To Cart
Black powder coating
$445.00 (set of 2)
Go To Cart
Chevrolet Orange powder coating
$445.00 (set of 2)
Go To Cart
Polished finish
$500.00 (set of 2)
Go To Cart

Dimensions: Click here for dimensions. A separate window will open. Please check for clearance issues with firewalls, brake boosters, alternator, air conditioning brackets, and the like.

Finishes: Read about finishes and construction of PML parts.

These tall heavy duty valve covers from PML for big block Chevy engines feature raised CORVETTE script and fins and top quality construction. The classic CORVETTE script is licensed from General Motors.

These valve covers have PCV and oil fill/breather holes and baffles cast into the covers. The internal baffles prevent oil blow-by out the PCV or breather holes. PML valve covers have walls and gasket flanges that are thick for strength and a secure seal to the cylinder head. The sand cast finish process provides an old-school look and feel.

PML designed these valve covers using original GM cast iron heads. Chevrolet Big block engines include: 396, 427, 454, and the 502.

These valve covers are a bit taller than stock to fit over many roller rockers, such as Jesel. Using double gaskets to add height frequently causes leaks. Customers have reported to us that PML tall valve covers eliminated the need for double gaskets and the leaks.

These big block engine Corvette covers do not have a brake booster cut-out on the driver's side in response to customer requests. (If you need a brake booster cut-out, please see our stock height big block valve covers.)

Checking Clearance

Click for dimensions.

Engine configurations vary so please check for clearance for larger valve covers. The walls and gasket flange are thicker than stock and the fins and script add height to the top.

Look for clearance on the inside also, especially if you have roller rockers. A simple check can be made if you have the stock valve cover. Set the stock cover on the head and measure the distance, if any, between the gasket flange surface and the head. Our cover is approximately 3/8 to 1/2 inch taller than the stock cover. PML tall covers are approximately 3/8 inch taller than our standard height covers.

Some customers have reported that their roller rockers contact the inside of these PML valve covers at corners. PML has heard that grinding a bit off the roller rockers on #1 intake and #6 intake, one intake rocker on each side of engine, can add enough clearance (but this is not something we have tried or endorse).

Flyer

Click to view or print PML Big Block Valve Covers PDF Flyer. A separate window will open and load the pdf file.

PML Valve Covers Compared to Stock

PML Valve Covers Part Number 11042 height compared to stock  PML Valve Covers Part Number 11042, compared to stock
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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.

Installations

1930 Ford with PML Valve Covers, Cast Finish

Mike purchased PML valve covers for his big block engine on his 1930 Ford Five Window Coupe street rod. This street rod does not have have a hood or fenders, similar to the American Graffiti Deuce Coupe. He chose the CORVETTE script to be slightly different. Our thanks to Mike for sharing his pictures and his comments.

His cam is a 283 grind Thumpr from Comp Cams and the roller rockers are a generic kind, gold in color and very squared off. He uses a standard gaskets, not extra thick.

To get the PML covers to fit, he rounded off the left side corners on two of the roller rockers. The valve covers fit great after grinding a bit off the roller rockers on #1 intake and #6 intake (one intake rocker on each side of engine). He did not remove any material from the valve covers. He was told later by an engine machinist that this procedure is virtually always necessary when you try to put roller rockers on a big block chevy.

1930 Ford.    1930 Ford.    1930 Ford.
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1973 Corvette with PML Valve Covers, Polish Finish

PML tall big block valve covers installed

Click on image at left to see a Flash slide show of these valve covers installed on Chuck Younger's 1973 Corvette with a Chevrolet big block engine. Chuck's company is Walden and Younger Corvette Restorations out of Alabama.

1963 Corvette with PML Valve Covers, Polish Finish

Corvette with PML Valve Covers  Corvette with PML Valve Covers, passenger's side  Corvette with PML Valve Covers, driver's side
Above images show a restoration by Alloway's Hot Rod Shop with PML's tall big block CORVETTE valve covers, polished.

PML Valve Cover Features

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

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.)

Learn more about finishes and construction of PML parts.

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