Industrial Injection X-Series 446B02 Upper without Head Gasket

Industrial Injection X-Series 44CB11 Lower

2011-2016 6.6L Duramax LML/LGH X-Series Gasket Sets

Industrial Injection

SKU: 446B02

Configuration

Price

$389⁹⁵

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Free Ground shipping (Over $200*)

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Industrial Injection X-Series LML/LGH Duramax Upper & Lower Engine Gasket Kits

Give your next diesel engine repair or rebuild a solid foundation with Industrial Injection X-Series Engine Gasket Kits.

Designed for engine rebuilds and resealing projects, these high-quality gasket kits help restore critical seals and prevent leaks. Tested and approved in-house by Industrial Injection, X-Series gaskets deliver sealing you can trust when it’s time to put your engine back together.

Whether you’re resealing the upper end, servicing the lower end, or tackling a full rebuild, these kits simplify parts sourcing and help you approach assembly with confidence.

Key Features

High-Quality Gaskets: Built for dependable sealing during engine rebuilds and resealing.
In-House Tested & Approved: Evaluated by Industrial Injection for quality and performance.
Leak Prevention: Help restore proper sealing at critical engine connections.
Convenient Kits: Reduce the hassle of sourcing individual gaskets for your repair.
Upper & Lower Options: Choose the kit that matches your engine and service needs.

Note: The Upper kit does not include head gaskets. Order one Left and one Right separately from the X-Series LB7-LML Head Gaskets in the grade your engine needs.

Options & Part Numbers

Upper without Head Gasket — Part # 446B02
Lower — Part # 44CB11

What's Included

Upper Gasket Set (446B02) — 87 pieces

2 × Air Filter Housing Intake Hose Seal Ring
1 × Air Intake Heater Gasket
1 × EGR Cooler Bypass Gasket
2 × Exhaust Manifold Gasket
2 × Fuel Feed Pipe Gasket
8 × Fuel Injection Pressure Regulator O-Ring
8 × Fuel Injector O-Ring
2 × Intake Manifold Gasket
2 × Lower Valve Cover Gasket
8 × Nozzle Holder Seal Ring
1 × PCV Hose Fitting Seal
2 × PCV Oil Separator O-Ring
2 × Seal
1 × Thermostat Bypass Tube O-Ring (Lower)
1 × Thermostat Bypass Tube O-Ring (Upper)
2 × Thermostat Housing Gasket
2 × Thermostat O-Ring
1 × Throttle Body Gasket
4 × Turbocharger Inlet Pipe Gasket
1 × Upper Intake Manifold Seal
2 × Valve Cover Gasket
32 × Valve Stem Oil Seal

Lower Gasket Set (44CB11) — 30 pieces

1 × Crankshaft Front Main Seal
1 × Crankshaft Rear Main Seal
1 × Front Oil Cooler Adapter Gasket
1 × Fuel Pump O-Ring
2 × Oil Cooler Gasket
1 × Oil Cooler Inlet Gasket
1 × Oil Cooler Outlet Gasket
1 × Oil Cooler to Rear Cover Gasket
2 × Oil Filter Tube O-Ring
2 × Oil Pan Gasket
2 × Oil Pump O-Ring
1 × Oil Pump Pickup Tube O-Ring
3 × O-Ring
1 × PCV Hose Fitting Seal
2 × Rear Cover Coolant Seal
3 × Seal
1 × Thermostat Bypass Tube O-Ring (Lower)
1 × Thermostat Bypass Tube O-Ring (Upper)
1 × Water Pump O-Ring
1 × Water Pump Outlet Pipe Gasket
1 × Water Pump To Engine Cover O-Ring

Fitment

2011-2016 Chevrolet Silverado and GMC Sierra 2500HD / 3500HD with the LML Duramax (VIN code L)
2010-2017 LGH Duramax (VIN code 8) in Chevrolet Express / GMC Savana vans and cab chassis
The lower set (44CB11) fits every 2001-2016 Duramax from LB7 through LML/LGH

Questions on fitment or which option you need? Contact Industrial Injection before ordering.

Shipping information

Free economy ground shipping on most orders over $200. This includes lower 48 United States only. Excludes products that must ship freight.

Core Return Info

Read Carefully!

When you purchase a product from our website that has a core requirement, you have two options:

1. You choose to pay the core charge and we will ship the product right away, then once we receive the cores you will be refunded the core charge if your cores pass our inspection qualifications. This is the preferred choice and has the least delays.

2. You choose to send in your cores before we ship the product that was purchased. This choice has the risk of delayed shipment of your purchased product and our inventory is not guaranteed by the time we receive your cores. You will need to follow all of the instructions below as quickly as possible so that you can get your purchased product and we can receive the cores. When you choose this option you acknowledge that by the time we receive your cores, our inventory could have change and there could be a delay in your shipment.

Please return all cores to:

Industrial Injection Core Returns
2858 South 300 West
Salt Lake City, Utah 84115

INCLUDE RA# THAT WAS ISSUED AT TIME OF PURCHASE! If RA # is lost, please call Customer Service at (800) 955-0476. Have your original invoice at time of phone call to give all appropriate information for return.

Core return freight is the responsibility of the customer

FULL CREDIT WILL BE GIVEN WHEN:

In order to receive full core credit, your core(s) must be returned within 90 days from receipt of order. It must be as is “off the engine.” Full core credit will be given if core meets acceptance criteria. Cores that are damaged during shipment to Industrial Injection are the responsibility of the customer and their shipping company.

½ CORE CHARGE CREDIT WILL BE GIVEN WHEN:

Slightly damaged housing or camshaft
Missing parts such as FCA

No Core Credit issued when:

Core is seized or hydraulic head is cracked
Excessive damage ( Heavy use of Bio-diesel and rust are common causes for unacceptable core)
Core is fire damaged
Core is returned after 90 days/3months

Please do the following when returning a core:

Make sure you have removed all fittings from your old unit
Drain all fuel and oil from unit
Package cores so that fuel and oil does not escape from the package

NOTE: packages that have fuel or oil residue on the outside of the box during shipping will not be delivered by UPS or the postal service which will cause delays.

Please re-use boxes and bags that parts were shipped in originally. These boxes are UPS approved to reduce damage while being handled in freight.
All shipping charges are the responsibility of the customer
Please write on the box “Core Return” and have RA # clearly written on the outside of box
Include copy of original invoice and RGA inside box

PLEASE RETAIN RA#, INVOICE # AND TRACKING NUMBER UNTIL CREDIT IS RECEIVED BY YOU. We do not research by customer name, only invoice # or RA #.

2011-2016 6.6L Duramax LML/LGH X-Series Gasket Sets

Industrial Injection X-Series LML/LGH Duramax Upper & Lower Engine Gasket Kits

Key Features

Options & Part Numbers