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GM Race Heads For 2004.5-2005 LLY 6.6L Duramax Industrial Injection

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$3,364.08
$3,254.47
(You save $109.61
SKU:
GHJV-PDM-LLYRH
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GM Race Heads For 2004.5-2005 LLY 6.6L Duramax Industrial Injection

$3,364.08
$3,254.47
(You save $109.61

The Industrial Injection LLY Duramax Race Heads are designed for the racer / sled puller in mind. Fully CNC ported heads complete ready to bolt on.

Heads are first jet washed in a high pressure spray cabinet to remove oil and dirt, then glass beaded to remove carbon. Next they are checked by magnafluxing, (cast iron only) or pressure testing. They are visually inspected for defects that would make them unusable. Valve guides and seats are removed as needed for porting.

Port development is accomplished using a superflow 600 flow bench with a computer recording all flow measurements.

Many things are considered when designing a cylinder head Port; air flow is only one of the things to think about. Another major concern is port wall thickness.

Anyone can get a head to produce high flow numbers, but if doing so leaves the port wall to thin the casting will crack. High performance Diesel heads are more prone to crack because of the thermal shock experienced by excessive intermittent or long term exhaust temperatures.

The porting is then preformed using a new 5 Axis CNC Cylinder Head Porting Machine with CAD/CAM software specifically designed for cylinder head porting. CNC porting brings unparalleled accuracy to head porting with each port flowing the same. This helps balance the power that each cylinder produces, making tuning easier.

New High Strength Alloy, Heat Treated iron based valve guides are installed. These guides are heat treated to Rockwell 22 Scale, which produces the ultimate in wear resistance. This is far superior to original guide material, including Bronze.

The guide incorporates a spiral grove inside the guide to hold oil and aid the lubrication of the valve during engine operation.

Guides are then honed (not reamed) to exact size using a diamond honing mandrel. Diamond abrasives allow for consistency of size, surface finish, and bore geometry with no variation from guide to guide. The guide size is then verified using a valve guide bore gauge.

As needed the head receives new Premium valve seat inserts made from a true Nickel Based Non-Magnetic material that was developed for extreme operating conditions.

Next the head is treated to a multi angle valve job to help maximize the flow of air in and out of the head. This is accomplished using a Serdi 100 guide and seat machine. Serdi uses a solid carbide straight shank pilot.

When inserted into the valve guide, it simulates the real valve stem during the centering process. This guarantees the valve seat is finished for a perfect valve to seat match.

Using CBN or Diamond tooling the head is given a new surface. With our berco milling machine we can control the surface finish to accommodate different head gasket types. For example MLS head gaskets require a very smooth surface finish.

Finally the head is jet washed dried and assembled with new valve seals and new performance valve springs.

Features:

  • 5 Axis CNC Cylinder Head Porting Machine with CAD/CAM software specifically designed for cylinder head porting
  • Diamond Honed Guides
  • Unshrouded Valves
  • High Strength Alloy, Heat Treated iron based valve guides
  • Premium valve seat inserts made from a true Nickel Based Non-Magnetic material
  • multi angle valve job
  • Peformance 95LB valve springs
  • Sold in a pair

Note: To receive full core credit we need a good, re-useable pair of cylinder heads. No cracks, warping, or excessive wear

Coops shipping and returns policy is as customer freindly as we can make, We want our customers to trust if your part is not exactly what you want we will make it right.
Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Coops Custom offers custom products and custom bundles with certain products, if you have a major project and you need more than one part please contact us at 800-214-6218.

Fender Flares: Available in color match colors.
Colored Matched Bud Shields: Most of our AVS bug shield are avialble in color match.
Power Combos: We offer bundles of tuners, exhausts and air intakes.
wheels and Tires: Coops offers mounted and balanced Wheel and Tire Combos.

Coops Customs General Aftermarket Auto Part FAQ.

  • Will This Void My Warranty?
    Most aftermarket parts that do not delete emissions will not void any warranty under the Magnuson Moss Act.
  • Who is Coops Customs?
    Coops Customs is a family owned business since 2007. Zac Cooper started Coops with his knowledge of aftermarket accessories and love of customizing his vehicles.
  • Do you accept returns?
    Yes. We will take any return within reason. Coops wants our customers to shop with confidence knowing no matter what we will make sure your happy.
  • Do I have to pay for shipping if this part doesnt fit?
    No. If you have a problem with fitment Coops will provide customer service to get you the correct part and pay to return your incorrect part.
  • How fast do you ship out products?
    We do a amazing job of working on a 99% same day ship rate. If you order is in by 2PM CST you can expect a tracking number the same day.
  • What methods of payment do you take?
    We accept all major credit cards, paypal, google pay, amazon pay and apple pay.
  • Can I pick my item up?
    Yes. Unlike some other online retailers Coops Custom is a actually store.
    Coops Customs is located at 107 W Ryder St, Litchfield, IL 62056
  • Do you save my credit card info.
    No way. We do not store any customers personal payment info.
  • Why shop at Coops?
    We still believe in family businesss and supporting the smaller guys. Coops wants to earn your business with greats prices, in stock products and the best customer service around.

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