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Chevy™ Small Block, GM LT1/LT4, Center Bolt, Finned Valve Covers
Part Number 10534
Orange Powder Coat With Brushed Fins
Dimensions: Click here for dimensions. A new tab or window will open.
Finishes: Read about finishes and construction of PML parts. This part is only available in the orange powder coat finish.
These PML valve covers feature a classic appearance with raised fins and strong cast aluminum construction. PML made these fin-only style valve covers for center bolt small block engines, GM Generation II LT1 and LT4.
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.
Orange Powder Coat Finish: Re–painting the valve covers would mean leaving the fins painted since brushing off the top of the fins would expose a line of the orange powder coat at the edges. This set is powder coated, so the color is baked onto the part.
PCV, oil fill, or breather holes: holes can be machined on the intake manifold side in the front or back (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. This fin-only design allows these valve covers to be used in non-GM applications such as Ford hot rods.
We have one set of these valve covers on SPECIAL.
These covers are slightly taller than stock to allow roller rockers. 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.
Valve covers feature internal cast-in baffles. Image shows inside of a valve cover.
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.
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. 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.
PML includes a set of our cork composite gaskets with our valve covers.
Gaskets are 0.190 to 0.200 inches thick.
We designed these for easy installation and to provide a leak-proof seal.
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.
The T&D Machine Products Competition Rocker Arms are shown in this 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. Click on image to view larger.
Any rocker system must have space between the rocker arms for the baffle webbing inside the PML valve covers to fit between the arms.
Installations and Customer Pictures
Read about our center bolt valve covers on corvetteforum.com.
Images below show a 1929 Ford Roadster designed and built by Pacific Coast Customs in Northern California.
PML Valve Cover Features
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.
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