440 Source.com Valley Pan Holddown Bars

Valley Pans and Accessories

This page covers "valley pans" which are sometimes referred to as "bathtub gaskets." It's the piece of sheet metal or stamped steel which fits below the intake manifold and seals off the lifter valley. We carry several different types, from the original stock replacement versions, to slick aftermarket fabricated sheet metal versions for use with aftermarket aluminum heads. We also carry the accessories which hold the valley pan on, such as the "holddown bars" and the bolts.

It's important to note that "B" (low deck) and "RB" (tall deck) engines both use different widths of both valley pans and holddown bars. Since the "RB" engine's deck is raised, this increases the distance between the heads, making it necessary to use a different intake manifold, valley pan gasket, and holddown bars.

Our fabricated sheet metal valley pans work great with our aluminum Stealth heads, Edelbrock RPM heads, or any other aftermarket heads which feature an unbroken deck surface where the lower edge of the head's deck surface meets the edge of the valley pan. It will also work with factory cylinder heads, however there may be a small gap where the lower deck surface has a break which may need to be filled with silicone, depending on the intake manifold you are using. The pan is shown upside down in the picture. When it is installed, the "lips" along the long sides will fit underneath the edge of the cylinder heads, making a tight seal and allowing the use of standard intake port gaskets. This pan is designed to work with SINGLE PLAIN INTAKES only. Dual plane intakes (including stock units) will not fit due to the exhaust crossover which hangs down underneath them. See the pan below if you are using a dual plane intake Because this pan is a single solid piece which fits "under" the cylinder head intake face edges, it requires at least one cylinder head to be off during installation or removal. Supplied in a gold irridite finish for good looks and corrosion resistance.

We carry these in two different versions, one for the "RB" (413/426/440) engines and one for the "B" (361/383/400) engines. Be sure to select the correct one for the type of engine you are working on.

Part No: 127-1009 - Sheet Metal Valley Pan - Single Plain - RB Engine - Price: $29.95

Part No: 127-1011 - Sheet Metal Valley Pan - Single Plain - B Engine - Price: $29.95

This valley pan is the same as above, except it features a clearance well which will clear the exhaust crossover found in many aftermarket dual plane intakes. This model works great with Performer RPM intakes. The RB Version works with the standard Edelbrock performer (non-RPM) but the B version requires the Performer RPM. These do not work with stock cast iron intakes. Our fabricated sheet metal valley pans work great with our aluminum Stealth heads, Edelbrock RPM heads, or any other aftermarket heads which feature an unbroken deck surface where the lower edge of the head's deck surface meets the edge of the valley pan. It will also work with factory cylinder heads, however there may be a small gap where the lower deck surface has a break which may need to be filled with silicone, depending on the intake manifold you are using. Because this pan is a single solid piece which fits "under" the cylinder head intake face edges, it requires at least one cylinder head to be off during installation or removal. Supplied in a gold irridite finish for good looks and corrosion resistance.

Part No: 127-1010 - Sheet Metal Valley Pan - RB Engine - Dual Plane - Price: $39.95

Part No: 127-1012 - Sheet Metal Valley Pan - B Engine - Dual Plane - Price: $39.95

Shown above are our very nice aftermarket Billet Aluminum valley pan holddown bars. We carry them in versions for both "B" and "RB" engines. Fully machined from billet aluminum stock, these include nice looking ball milling between the bolt holes. Supplied with a clear anodized finish for long lasting protection AND great looks! A nice touch for any showcar, race car or street machine. Little things like these make all the difference. Don't forget the bolts for these (listed below.)

Part No: 200-1041 - Billet Aluminum Valley Pan Holddown Bars - Clear Anodized - "RB" engine- NEW. Pkg of 2. Price: $18.95

Part No: 200-1042 - Billet Aluminum Valley Pan Holddown Bars - Clear Anodized - "B" engine- NEW. Pkg of 2. Price: $18.95

Shown above are our very nice aftermarket Billet Aluminum valley pan holddown bars. We carry them in versions for both "B" and "RB" engines. Fully machined from billet aluminum stock, these include nice looking ball milling between the bolt holes. Supplied with a BLACK anodized finish for long lasting protection AND great looks! A nice touch for any showcar, race car or street machine. Little things like these make all the difference. Don't forget the bolts for these (listed below.)

Part No: 200-1043 - Billet Aluminum Valley Pan Holddown Bars - BLACK Anodized - "RB" engine- NEW. Pkg of 2. Price: $18.95

Part No: 200-1044 - Billet Aluminum Valley Pan Holddown Bars - BLACK Anodized - "B" engine- NEW. Pkg of 2. Price: $18.95

Our ARP black oxide coated valley pan holddown bar bolt kits are exactly what people mean when they say "show quality." Made from start to finish right here in Southern California, they are forged from aircraft quality 8740 Chrome Moly steel that exceeds the most stringent aircraft quality standards, and are rated at a minimum 170,000 PSI, which is even stronger than a grade 8 bolt! These feature a reduced diameter 12 pt. head. Matching black oxide washers are included. Small details like this can really make a car "show quality." Order one kit per engine.

Part No: 129-1018 - ARP Bolt Kit - VP Holddowns - Black Oxide 12pt. - Price: $12.95

Our ARP polished stainless steel valley pan holddown bar bolt kits are exactly what people mean when they say "show quality." Made from ARP's proprietary "300" stainless steel alloy, they are rated at a minimum 170,000 PSI, which is even stronger than a grade 8 bolt! And, you can't beat the quality, shine and corrosion resistance of polished stainless, especially for the valley pan bars, where they are right up at the top of the engine. Nothing resists the ravages of weather, time and even repeated tightening and loosening like stainless. These are truly maintenance free! Matching polished stainless washers are included. Small details like this can really make a car "show quality."

Part No: 129-1028 - ARP Bolt Kit - VP Holddowns - Stainless 12pt. - Price: $14.95

Shown above is our brand new "factory type" steel bathtub intake gaskets. These are available for an "RB" (413/426W/440) or "B" engines. "B" (361/383/400) engines use a slightly narrower version of this gasket because of the lower deck height (which puts the heads a bit closer together.) These also include a tube of silicone to help seal around the ports and in the lifter valley area.

Part No: 112 -1001 - Intake Valley Pan Gasket - "RB" - New - Price: $18.95

Part No: 112 -1002 - Intake Valley Pan Gasket - "B" - New - Price: $16.95

Shown above is the stock replacement "RB" engine valley pan hold down bars.

Part No: 100-1039 - Valley Pan Holddown Bars "RB" engine- Used. Pkg of 2. Price: $14.95

Shown above is the difference between the "B" and "RB" versions. An easy way to tell the difference at swap meets (aside from measuring the length) is to note how far the ends of the bars extend past the bolt holes. The top bar is an "RB," the bottom is a "B." Chrysler part numbers are 1859332 for the "B" and 1851665 for the "RB." One interesting fact is the the RB Chrysler part number is lower, (therefore earlier,) which would suggest the "RB" was in fact developed with or even before the "B" engine. It is commonly thought that the "B" engine was developed, and then later "re-engineered" into a raised deck version, (the "RB" or "Raised Block.") Perhaps this is because the "B" was introduced in 1958 and the "RB" in 1959.

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