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Chevy™ Small Block
GM LT1/LT4, Center Bolt
CORVETTE® Script and Fins
Valve Covers

P/N 11041

PML SBC Center Bolt Corvette Valve Covers, As-Cast FinishPML GM Licensing Stamp PML SBC Center Bolt Corvette Valve Covers, BlackPML GM Licensing Stamp
PML SBC Center Bolt Corvette Valve Covers, OrangePML GM Licensing Stamp
PML SBC Center Bolt Corvette Valve Covers, PolishedPML GM Licensing Stamp
As-Cast Finish
$325 with PCV Hole and Breather Hole
$280 with PCV Hole or Breather Hole
$235.00 without Holes
Go To Cart
Powder Coat Finish
$440 with PCV Hole and Breather Hole
$395 with PCV Hole or Breather Hole
$350.00 without Holes
Black: Go To Cart
Chevrolet Orange: Go To Cart
Polished finish
$490 with PCV Hole and Breather Hole
$445 with PCV Hole or Breather Hole
$400.00 without Holes
Go To Cart

Dimensions: Click here for dimensions. A separate window will open and load the image.

Finishes: Read about finishes and construction of PML parts.

The valve covers feature vintage CORVETTE script lettering and fins for a classic appearance. The script and lettering are raised. PML made these classic style valve covers for center bolt small block engines, GM Generation II LT1 and LT4.

PML designed these covers so that the top shows off the the fins and lettering. The design removed two bolts and the PCV/breather/oil fill holes from the top surface and added the script and fins.

Award winning two-bolt design: Stock valve covers have four bolts holding the cover on to the engine. PML's two-bolt design removes the two center bolts for an attractive presentation. Because PML valve covers have thick wall sand cast aluminum construction, they are much stiffer than stock and need only two bolts to apply pressure evenly to the gasket. PML valve covers will not tweak, bend, twist or deform. No leaks and a great look to dress up your engine.

If PCV, oil fill, or breather holes are needed, they can be machined on the intake manifold (scroll down for more info).

Many crate engines, 1987-1998 Silverado, Sierra, Suburban, Tahoe, Corvette, Impala SS, Camaro Z28, and mid-90s Pontiac Camaro and Firebird have small block center bolt heads.

PML also makes covers for these engines with fins-only design or CHEVROLET script.

We have two sets of these valve covers on SPECIAL: #168 and #193, both in polish finsh

About Fitment

These covers are slightly taller than stock to allow for many types roller rockers. Use the dimensions to see if these will work with your particular configuration. Please check for interference from a taller valve cover as some engines have a bracket or other parts that sit close to the stock covers. Click here for dimensions.

Baffles

Valve covers feature internal cast-in baffles. Image shows inside of a valve cover.

PML Center Bolt Valve Covers, baffles

Optional PCV, Breather and Oil Fill Holes

PML small block valve covers are made without holes for PCV, oil fill or breather. PML can machine holes to your specifications.

PML Center Bolt Valve Covers, PCV and breathers

For engines that require PCV and breather holes on the valve cover, PML designed the casting to be thicker on the intake manifold side and put baffles on the inside in two locations. This area can be machined with a hole. This way, the top of the valve cover is left alone for a clean, classic appearance.

A separate breather hole is not needed since the PCV or push-in breather can be removed and oil added there.

When ordering holes, you will need to specify the hole location. Holes can be machined on the passenger's side cover or on the driver's side cover, towards the front of the car or towards the rear. You can choose the location and type of hole needed in the shopping cart or can call to order. International customers, please email us for ordering.

Please read this PDF file on oil fill, breather and PCV set-up.

PML uses four or five different tools on a CNC machine to create a clean, leak-free hole for PCV, breather or oil fill. Spot facing provides a smooth sealing surface for grommets.

To learn more, we have two videos. Please watch this watch this step-by-step video of PML machining a PCV hole. We also have a step-by-step video of PML machining a breather hole.

PML machining tools

The information is generally the same although a different PML valve cover is shown in these videos.

You can call to order or use the options in the shopping card to specify your requirements for PCV, oil fill or breather.

Gaskets

Suggested gasket for PML small block Chevy valve covers Installing PML valve covers with a gasket Installing PML valve covers with a gasket, top view

PML recommends using Fel-Pro gaskets with these valve covers. The part number is VS 50088 R.

To install the covers using these gaskets, hold the gasket in place with your fingers and put your thumbs over the screws on the top. Then carefully fit the valve covers on the head making sure to get the groove on the covers lined up with the groove on the head. Put the exhaust side in first. Not getting the grooves lined up is a cause of leaks.

PML Small Block Valve Covers with T&D Rocker Arms

PML designed small block Chevy valve covers to work with many roller rocker systems, such as Jesel. However, our valve covers are not compatible with T&D Shaft Mounted Rocker Arms.

The T&D Machine Products Competition Rocker Arms are shown in the image at left. The shaft mounts are very tall, almost to the top of the rocker arms. The PML cast-in internal baffles will contact these mounts.

shaft mounted rocker arms
Click on image to view larger.

PML Valve Covers Compared to Stock

PML Valve Covers Part Number 11041 height compared to stock  PML Valve Covers Part Number 11041, 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.

Installations

1932 Ford

PML valve covers on a 1932 Ford with a ZZ3 350 crate engine PML valve covers on a 1932 Ford with a ZZ3 350 crate engine, passenger side

This 1932 Ford at the Grand Nationals in January of 2011 shows these PML valve covers in polish finish with black paint between the fins and script. The engine is a ZZ3 350 and the transmission is a 700R4. This roadster belongs to Bryan in Riverside, CA and kindly allowed us to take some pictures.

1964 Corvette, PML Natural Cast Finish Valve Covers

Jerry selected natural cast finish PML valve covers to dress up his 1964 Corvette ZZ4 engine. PML machined one hole in each cover on the intake manifold side above the "e" in the CORVTTE script. Our thanks to Jerry for choosing PML valve covers and for the pictures. Images show (from left to right): orignal cover, Corvette, driver's side of the engine

1964 Corvette ZZ4 with PML valve covers   1964 Corvette ZZ4 with PML valve covers   1964 Corvette ZZ4 with PML valve covers
Click on image to view larger.

1964 Corvette, PML Polish Finish Valve Covers

Jim Smith installed PML valve covers on his 1964 Corvette with a GM 350 CID ZZ4 engine. Per his request, PML machined a hole on the intake manifold side of the cover on the driver's side for PCV. And it worked out perfectly. Our thanks to Jim for sharing his pictures.

1964 Corvette with PML valve covers  PML valve covers on 1964 Corvette, driver's side  PML valve covers on 1964 Corvette, passenger's side

1965 Corvette, PML Cast Finish Valve Covers

Levi sent us pictures of his 1965 Corvette Convertible. He did not take any pictures of the old covers because "it looked like crap." His Corvette has a Chevy Crate 350HO engine with a Muncie 4 speed. Our thanks to Levi for sharing his pictures.

1965 Corvette Convertible  1965 Corvette Convertible Interior  1965 Corvette Convertible, Engine with PML valve covers  1965 Corvette Convertible, Engine with PML valve covers, drivers side
Click on image to view larger.

Farm Truck by Art Morrison Enterprises

This Farm Truck restoration by Art Morrison Enterprises includes PML small block Chevy valve covers with CORVETTE script and fins. Holes machined in the rear of both valve covers provide for PCV and a breather.


Art Morrison Restoration of a Farm Truck  PML valve covers on classic Farm Truck, driver's side  PML valve covers on a classic Farm Truck, passenger's side
From left to right: truck, view of driver's side with push-in breather barely visible, view from passenger's side showing PCV connection
Click on image to view larger.

Corvette Forum

Read about our center bolt valve covers on corvetteforum.com.

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.