11040-BK | PML Cover Valve Covers Center Bolt, CHEVROLET Script And Fins For Chevy Small Block, GM Generation II LT1 and LT4 Engines | Black Powder Coat Finish

Price for set of 2 covers. Includes PML gaskets and mounting bolts.

Number of Bolts: 

4 per stock cover, on the top, PML cover uses 2 bolt as PML cover is thick and rigid so 2 bolts is plenty for a no leak seal

Finishes:

The valve covers feature vintage CHEVROLET lettering and fins for a classic appearance. PML made these for GM Generation II LT1 and LT4 small block engines, center bolt mounting.

Benefits:

• Traditional look
• GM licensed product
• Heavy duty sand cast aluminum 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

Award winning two–bolt design: These valve covers won the SEMA 2007 Global Media Award for the two bolt mounting 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.

The CHEVROLET script and fins are cast into the cover and are raised. On powder coated parts, the powder coat is shaved off the top of the script and the fins.

Also available with CORVETTE script.

Gaskets: One set of custom cork composite gaskets included with each set of valve covers.

PML made these valve covers for GM Generation II LT1 and LT4 small block engines, center bolt mounting to the cylinder head.

These applications may have Chevy small block engines with center bolt mounting and be able to use these valve covers:

• Crate engines, such as ZZ4 and Ramjet
• 1987 to 1998 Silverado, Sierra, Suburban, Tahoe
• 1987 to 1998 Corvette, Impala SS, Camaro Z28
• Mid 90s Pontiac Camaro and Firebird

Configurations vary! Always check your engine before ordering. 

These valve covers are larger than stock. On many stock engines, there is a bracket close to the stock covers that will need modifying to work with these PML covers.

Fitment

PML fits each valve cover on an original GM cast iron cylinder head.

These valve covers may fit differently on aluminum or aftermarket heads. Keep this information in mind:

• PML covers are slightly larger than stock.
• The extra height allows for many types roller rockers but not all.
• Check for interference. 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 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. 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

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

If these valve covers are ordered with machining for PCV, Breather or Oil Fill holes, there is no return or refund. This would be custom machining and the sale is final.

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.

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.

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.

Included With Valve Covers

PML includes new mounting bolts and a set of our custom cork composite gaskets with the valve covers.

Gaskets

PML includes a set of our thick, cork composite gaskets with our valve covers. Gaskets are approximately 0.25 inches thick. We designed these for easy installation and to provide a leak proof seal.

Depending on the engine configuration, using less thick gaskets or gaskets made from other materials may cause installation problems or not completely seal. For example, PML valve covers have a rail to hold the gasket in place while placing the valve cover and gasket on the cylinder head and if a thick gasket is not used, the rail may contact the cylinder head, preventing a good seal.