440 Source "Stealth" Aluminum Cylinder Heads-store.440source.com

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Our Stealth heads are BACK IN STOCK in limited quantities. Get 'em while you can...

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200-1201

Stealth Aluminum Cylinder Head - DUAL SPRINGS - COMPLETE - SINGLE HEAD
Since 2007, our STEALTH aluminum cylinder heads have been hands down the best bang for the buck you can find! Now we offer them already setup with Dual Valve Springs for cams up to .650" lift! Capable of an easy 550 horsepower (when used with our 500+ inch stroker kits) these have the potential to make 650-700+ horsepower with port work and upgrades.

In Stock

200-1055

Stealth Aluminum Cylinder Head - SINGLE SPRINGS - COMPLETE - SINGLE HEAD
Since 2007, our STEALTH aluminum cylinder heads have been hands down the best bang for the buck you can find! This version comes setup with a SINGLE VALVE SPRING, for use with FLAT TAPPET cams under .510" lift. Capable of an easy 550 horsepower (when used with our 500+ inch stroker kits) these have the potential to make 650-700+ horsepower with port work and upgrades.

In Stock

109-1514

Stealth Cylinder Head Bolt Kit - 12pt.
If you are using our Stealth aluminum cylinder heads, these brand new head bolts are just the ticket. Featuring very high strength, but still at a great price, these are the way to go. Priced at a fraction of the cost of the name brand bolts, these are custom made for us by one of the largest bolt manufacturers around. They feature reduced diameter 12 point heads for easy access in applications that have countersunk head bolts (such as our Stealth aluminum heads or Edelbrock Performer RPM heads), but they also work great with factory iron heads. Rated at 180,000 PSI, they are far stronger that the factory head bolts, or even a standard type grade 8 bolt. We even include .100" thick hardened washers with them. One set contains enough bolts for two heads (one complete engine.)

In Stock

112-1015

Stealth Cylinder Head Gasket (Qty 1) - Black
Our new "Stealth" cylinder head gaskets are a perfect match for our Stealth cylinder heads. They come teflon coated, which allows for a perfect seal on engines which have dissimilar metals, such as an iron engine block with aluminum heads. Because aluminum expands at a rate much greater than iron, these two surfaces move against each other as the engine heats up and cools down. The teflon allows for this movement, making sure there will not be any coolant or combustion leaks, even during extended street driving. We've fully tested these at up to 12:1 compression. These fit all big blocks, all years. They are sold individually (one single gasket,) so be sure to order two if you need a set. Compressed thickness on these head gaskets is .051" The Teflon coating is designed to be installed dry, so no chemicals or sealers are necessary for installation. Just clean your deck surfaces (we recommend using laquer thinner for this), bolt 'em on and go. Although these are designed for our aluminum Stealth heads, they also work great with other brands of aluminum heads such as Edelbrock, Trick Flow, ProMaxx, etc and you can even use them on factory iron heads also.

In Stock

138-1000

Champion Spark Plugs 3/4 extended reach - Set of 8 - NEW
We carry the 3/4" extended reach plugs our heads require. These are sold in sets of 8 only.

In Stock

COMPVALVEJOB

Competition Valve Job - for Stealth Cylinder Heads
While the typical "production" valve job work done on any mass produced head is fine for most applications, for those that want super accurate, very high precision work, we offer our competition valve job for our Stealth Aluminum cylinder heads. As you can see in the picture, we use only the best equipment, a genuine USA Made SUNNEN VGS-20 seat and guide machine. The tooling we use is the SGM series tooling, which is the strongest, most stable tooling offered, which assures the highest quality, most accurate and consistent results. For most applications, we cut a 30 degree top cut, a 45 degree seat, and a 60 degree throat cut. We keep a seat width of .060" for the intake seats and .080" for the exhaust seats, which works well for performance applications but is also very durable for street driving. After doing the work, we also hand lap each seat. This does two things, it allows us to visually verify with 100% certainty that the valve to seat contact has the correct position on the valve, width and concentricity, and most importantly it verifies the valve is making a good, tight seal to the cylinder head. AND, because we have to fully disassemble the cylinder head in order to do all this work, if you are upgrading to double valve springs and/or 10 degree locks and retainers, we will re-assemble the head with the upgraded components at no extra charge! That's a $100 savings. And, all the work is done right here at our shop in Carson City by Terry, who has had many years of machine shop experience under his belt. This allows us to keep all QC processes in house and and under our direct supervision and control. If you are ordering Steath heads (regular or CNC ported), simply add this part to your order and we will perform the work on the heads before they ship. In most cases, please allow 2-3 days time to complete the work.

In Stock

145-1002

Super Duty 10 Degree 11/32" Valve Locks
Shown here is our 10 degree Super Duty valve locks. These are a huge, extremely beefy valve lock which has a wider angle of interference than a standard 7 degree lock. These are fully machined (not stamped) from a super tough fatigue resistant alloy. These are recommended these for any cams over .460" lift. These fit 11/32 valve stems, which can be found on most aftermarket aluminum heads (such as our Stealth heads or Edelbrock RPM's,) and they work great (and must be used with) our 10 degree retainers, part number 145-1003, which can be found on our Valve Retainers page. We highly recommend upgrading to these for extra insurance. These are supplied in a set of 32, enough to do one complete engine.

In Stock

145-1003

Super Lock 10 Degree Steel Retainers - Set of 16
Shown here is our 10 degree "Super Lock" Steel Retainers. These are a huge, extremely beefy valve retainer which is designed to fit our 145-1002 ten degree "Super Locks," which can be found on our Valve Locks page. This 10 degree lock & retainer system has a wider angle of interference than a standard 7 degree lock. These are fully machined from 4140 Chrome Moly and finished in black oxide. Most major cam manufacurers recommend going to a 10 degree setup for extra insurance with any cams over .460" lift, and it is generally considered mandatory for any cams using a dual valve spring setup and/or over .510" lift. We highly recommend upgrading to these for extra insurance. These are supplied in a set of 16, enough to do one complete engine.

In Stock

101-1049

All Teflon Valve Seals - 11/32 stem / .530 OD guide
ALL TEFLON type seals, sometimes known as "PC" seals for Perfect Circle, one of the first companies to start selling them. These actually fit positively over the valve guide and "wipe" the valve stems as they open and close. These are an UPGRADED type seal which will fit our Stealth heads. They also feature a smaller diameter which is necessary when running dual valve springs. Sold as a set of 16 pieces, enough for one complete engine.

In Stock

HEADLABOR2

Extended Cylinder Head Labor - R&R Springs Seals Locks Ret.
This is a labor charge for us to remove and replace valve springs, seals, locks and retainers. This labor charge must be selected in the same order as the cylinder heads, along with the new valve locks, retainers, seals and springs you want upgraded. Does not include custom shimming each spring to a specific installed height.

In Stock

129-1035

12 Point Bolt Kit - Cylinder Head - Stainless Steel
For those who want the best of the best, our fully polished stainless steel cylinder head bolt & washer bolt kits are exactly what people mean when they say "show quality." Made from high grade stainless steel alloy, these are often used in marine and aircraft enviornments which require the utmost in chemical and corrosion resistance. 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. Nothing resists the ravages of weather, time and even repeated tightening and loosening like stainless. These are truly maintenance free! Small details like this can really make a car "show quality." These work great for high horsepower and/or highly stressed applications with our STEALTH aluminum cylinder heads, factory cast iron heads, Edelbrock Performer RPM aluminum heads, or any other heads that use stock length bolts. A 12 point head design with reduced wrenching size and wide area flanged head eliminates the need for retorquing. Includes enough bolts for two heads (one complete engine.)

In Stock

127-1009

Sheet Metal Valley Pan - RB Engine - Single Plane
Our fabricated sheet metal valley pans work great with our aluminum Stealth heads, Edelbrock RPM heads, Trick Flow 240's AND 270's, 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. They 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. We do have some other models which may work 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.

In Stock

127-1010

Sheet Metal Valley Pan - RB Engine - Dual Plane
This valley pan is the same as our single plain models, except it features a clearance well which will clear the exhaust crossover found in the Edelbrock Performer RPM intake manifold. It DOES NOT work with stock cast iron intakes, the Edelbrock standard Performer, or any others. These also work well 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. This version fits the "RB" (413/426/440) engines.

In Stock

127-1011

Sheet Metal Valley Pan - B Engine - Single Plane
Our fabricated sheet metal valley pans work great with our aluminum Stealth heads, Edelbrock RPM heads, Trick Flow 240's AND 270's, 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. They 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. We do have some other models which may work 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. This version is for the "B" (361/383/400) engines.

In Stock

127-1012

Sheet Metal Valley Pan - B Engine - Dual Plane
This valley pan is the same as our single plain models, except it features a clearance well which will clear the exhaust crossover found in the Edelbrock Performer RPM intake manifold. It DOES NOT work with stock cast iron intakes, the Edelbrock standard Performer, or any others. These also work well 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. This version fits the "B" (361/383/400) engines.

In Stock

Stealth Aluminum Cylinder Head - DUAL SPRINGS - COMPLETE - SINGLE HEAD

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Stealth Aluminum Cylinder Head - SINGLE SPRINGS - COMPLETE - SINGLE HEAD

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Stealth Cylinder Head Bolt Kit - 12pt.

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Stealth Cylinder Head Gasket (Qty 1) - Black

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Champion Spark Plugs 3/4 extended reach - Set of 8 - NEW

In Stock

Competition Valve Job - for Stealth Cylinder Heads

In Stock

Super Duty 10 Degree 11/32" Valve Locks

In Stock

Super Lock 10 Degree Steel Retainers - Set of 16

In Stock

All Teflon Valve Seals - 11/32 stem / .530 OD guide

In Stock

Extended Cylinder Head Labor - R&R Springs Seals Locks Ret.

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12 Point Bolt Kit - Cylinder Head - Stainless Steel

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Sheet Metal Valley Pan - RB Engine - Single Plane

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Sheet Metal Valley Pan - RB Engine - Dual Plane

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Sheet Metal Valley Pan - B Engine - Single Plane

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Sheet Metal Valley Pan - B Engine - Dual Plane

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