4089263OS | Cummins B/ISB/QSB Upper Engine Gasket Set, New

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4089263OS | Cummins B/ISB/QSB Upper Engine Gasket Set, New

Product Overview
This heavy-duty replacement component is engineered to meet or exceed OEM specifications for reliable performance and long service life in demanding diesel engine applications. Each unit is manufactured with strict quality control standards to help ensure proper fitment and durability in professional diesel engine rebuild environments.

Kit Contents

Kit: M-4089263OS — Gasket Set - Upper Engine
Line No Kit Item No Item Name Qty UOM
1 M-3969988 Gasket - Connection 2 EA
2 M-3963379 Gasket - Rocker Housing Cover 1 EA
3 M-4933628 Plate - Lock 4 EA
4 M-4931365 Gasket - Oil Drain 1 EA
5 M-3928624 Seal - O-ring 2 EA
6 M-3922794 Seal - O-ring - Turbo House 1 EA
7 M-3678603 Seal - O-ring 1 EA
8 M-3954324 Gasket - Rocker Cover 1 EA
9 M-3906698 Seal 1 EA
10 M-3087740 Seal - O-ring 6 EA
11 M-5266422 Gasket - Exh Manifold 6 EA
12 M-3963988 Washer - Sealing 3 EA
13 M-3963983 Washer - Sealing 21 EA
14 M-3949417 Gasket - Exh Gas Rcn Valve 1 EA
15 M-3949910 Gasket - Connection 4 EA
16 M-3949916 Seal - Rectangular 1 EA
17 M-3066211 Seal - O-ring - Turbocharger 1 EA
18 M-4934278 Washer - Sealing 10 EA
19 M-4934279 Washer - Sealing 4 EA
20 M-3958414 Seal - O-ring 2 EA
21 M-3963981 Washer - Sealing 4 EA
22 M-3947530 Gasket - Int Manifold Cover 1 EA
23 M-3954829 Seal - Thermostat 1 EA
24 M-3920773 Gasket 1 EA
25 M-3955457 Gasket - Acc Drive Cover 1 EA
26 M-4010519 Seal - O-ring 1 EA
27 M-3883284 Seal - O-ring 1 EA
28 M-3957131 Seal - O-ring 2 EA
30 LABEL NUMBER 1 2 EA
31 M-4890926 Seal - O-ring 6 EA
32 CG69 PR 1 EA
33 M-3966342 Gasket - Cylinder Head Grade B 1 EA
34 M-3966343 Gasket - Cylinder Head Grade A 1 EA
35 M-3973512 Seal - O-ring 1 EA
36 M-3937142 Injector Seal - Mid Range XPI 6 EA
37 M-4062328 Seal - O-ring 6 EA
38 M-3949530 Gasket - Turbocharger 1 EA
39 CUM-CGK-202-WAR-0001 1 EA
40 LABEL 4X12 1 EA
41 CG69PAD 2 EA

Key Features

  • OE-style fitment for proper installation
  • Durable construction for demanding operating conditions
  • Engineered for dependable heavy-duty diesel performance

About Interstate-McBee
Interstate-McBee is a trusted manufacturer of premium aftermarket diesel engine components. Products are manufactured under ISO 9001:2015 quality management standards and are engineered to meet or exceed OEM specifications. With decades of experience supporting the diesel and gas engine industries, Interstate-McBee components are designed to deliver consistent quality, reliability, and performance for heavy-duty engine applications.

Any mention of OEM names or OEM product ID numbers/descriptions/model numbers is intended for identification purposes only and does not indicate that it is an OEM part.

  • 4089263OS

Free Standard ground shipping within the Continental US! If you need your parts in a hurry and would like to get them overnighted or expedited please give us a call and our sales reps will let you know what options are available!

2 year warranty applies!

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Buy Now, Pay Later

Interest-Free Up To 12M

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Above The Line

Customer Service Guaranteed

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Free Ground Shipping

On All Orders!

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Premium Quality Parts

Manufacturing Since 1973

offer

Buy Now, Pay Later

Interest-Free Up To 12M

offer

Above The Line

Customer Service Guaranteed

offer

Free Ground Shipping

On All Orders!

offer

Premium Quality Parts

Manufacturing Since 1973