PML Corvette LT1, LT4 valve covers, center bolt for Chevy small block engines

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PML Valve Covers for Chevy™ Small Block LT1/LT4 Engines, Center Bolt Mount CORVETTE® Script and Fins Part Number 11041 Valve Covers include new mounting bolts and a cork-composite gasket of our own design.
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As-Cast Finish: $415.00 with PCV Hole and Breather Hole $365.00 with PCV Hole or Breather Hole $315 without Holes	Black Powder Coat: $585.00 with PCV Hole and Breather Hole $535.00 with PCV Hole or Breather Hole $485 without Holes	Orange Powder Coat: $585.00 with PCV Hole and Breather Hole $535.00 with PCV Hole or Breather Hole $485 without Holes	Polished Finish: $650.00 with PCV Hole and Breather Hole $600.00 with PCV Hole or Breather Hole $550 without Holes
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. PML made these for GM Generation II LT1 and LT4 small block engines, center bolt mounting. Script and fins are raised Top shows off the the fins and lettering Heavy duty construction for secure two bolt clamping on the cylinder head Optional PCV/Breather/Oil Fill holes on intake manifold side for a functional yet clean design Gasket and new mounting bolts included Slightly taller than stock CORVETTE script used under license to PML, Inc., by General Motors Also available with CHEVROLET script. Award winning two–bolt design: Stock valve covers have four bolts holding the cover on to the engine. PML 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. These valve covers won the SEMA 2007 Global Media Award. PCV, Breather, Oil Fill Holes: If PCV, oil fill, or breather holes are needed, they can be machined on the intake manifold. See Specifications for Optional PCV, Breather and Oil Fill Holes. Applications: 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. Fitment Click here for dimensions. Use these dimensions to check if PML valve covers will fit on your engine. These covers are slightly larger than stock. The extra height allows for many types roller rockers but not all. Check for interference from a taller valve cover as some engines have a bracket or other parts that sit close to the stock covers. Some customers have reported modifying their alternator bracket so these covers will fit PML fits each valve cover on an original cast iron cylinder head. Click on image to view larger These valve covers may fit differently on aluminum or aftermarket heads. PML Small Block Valve Covers with Rocker Arms: PML designed small block Chevy valve covers to work with many roller rocker systems. However, our valve covers are not compatible with shaft mounted rocker arms such as T&D. Click on image to view larger. The T&D Machine Products Competition Rocker Arms are shown in this image. The shaft mounts are very tall, almost to the top of the rocker arms. The PML cast-in internal baffles will contact these mounts. Any rocker system must have space between the rocker arms for the baffle webbing inside the PML valve covers to fit between the arms. Inside of PML Valve Covers and Baffles Click on image to view larger. Image shows inside of a valve cover. The areas next to the bolt holes are baffles for optional PCV and breathers. These are cast–in. Optional PCV, Breather and Oil Fill Holes Read this PDF file on oil fill, breather and PCV holes (click here). PML small block valve covers are made without holes for PCV, oil fill or breather. PML can machine holes to your specifications. 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 for holes. The top of the cover cannot be machined. A separate oil fill hole is not needed since the PCV or push-in breather can be removed and oil added there. Click on image to view larger. 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. Video of PML machining a PCV hole Video of PML machining a breather hole The information is generally the same although a different PML valve cover is shown in these videos. 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. Gaskets Click on small image to view larger in a new tab or window. PML includes a set of our cork composite gaskets with our valve covers. Gaskets are 0.180 to 0.200 inches thick. We designed these for easy installation and to provide a leak-proof seal. PML Valve Covers 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. Installations 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. 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. 1929 Ford Roadster Richard installed these valve covers on his 1929 Ford Roadster pickup with a Corvette LT4 motor. He used slightly shorter bolts than PML provided to get a good seal with these aluminum heads. LT4 Corvette motor in a 1929 Ford Roadster Passenger side of engine Driver side of engine Click on image to view larger in a new tab or window. 1932 Ford 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. Click on an image to view larger in a separate window or tab. 1955 Belair Wagon Eric installed these PML center bolt valve covers on his 1955 Belair Wagon and says "they look awesome!" Pictures from left to right: 1955 Belair Wagon, roller rockers, gasket on PML valve covers, PML valve covers installed Click on an image to view larger in a separate window or tab. 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 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. 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. Click on image to view larger. 1965 Corvette, PML Polish Finish Valve Covers Piper Automotive Service of North Miami (305-903-7946) sent us "before" and "after" pictures of this GM 350/345 ZZ1 engine. They made a few adjustments to get the covers to fit and are very happy with how great they look on this 1965 Corvette. 1965 Corvette Stock Valve Covers, passenger side 1965 Corvette Stock Valve Covers, driver side 1965 Corvette PML Valve Covers, passenger side 1965 Corvette PML Valve Covers, driver side 1965 Corvette Click on image to view larger in a new tab or window. 1965 Corvette, 350 Motor, PML As Cast Finish Valve Covers 1965 Corvette Corvertible, 350 motor Stock valve covers PML valve covers installed Click on image to view larger in a new tab or window. 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.