1276974 | Caterpillar 6.25"/D353/D379/D398/D399 Cylinder Head Gasket Set, New

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1276974 | Caterpillar 6.25"/D353/D379/D398/D399 Cylinder Head 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-1276974 — Gasket Kit - Cylinder Head
Line No Kit Item No Item Name Qty UOM
1 M-1S764 Gasket 1 EA
2 M-4H2494 Sleeve 1 EA
3 M-5B3718 Seal - O-Ring 6 EA
4 M-6F1069 Seal - O-Ring 6 EA
5 M-6F7767 Gasket 1 EA
6 M-6L5362 Gasket - Air Comp 2 EA
7 M-6L5369 Gasket 2 EA
8 M-7M7666 Gasket 6 EA
9 M-7N3033 Shim - Head Gasket 2 EA
10 M-7N6244 Seal - Spacer Plate 16 EA
11 M-1S795 Gasket - Water Lines Group 1 EA
12 M-8F4994 Seal - O-ring 6 EA
13 M-8M5266 Seal - O-ring 1 EA
14 M-8N7892 Gasket - Alternator 2 EA
15 M-8S4275 Seal 24 EA
16 M-5H2912 Gasket 6 EA
17 M-6N2235 Gasket 6 EA
18 M-1S4295 Gasket - Turbocharger 1 EA
19 M-1S4810 Gasket - Turbocharger Oil Supp 1 EA
20 M-1S6595 Gasket - Turbocharger Oil Supp 1 EA
21 M-1W6440 Gasket - Cylinder Head 2 EA
22 M-2H2519 Gasket - Starter 2 EA
23 M-2M707 Gasket 1 EA
24 M-3S5496 Seal - O-ring 2 EA
25 CG70PAD 2 EA
26 CG70PR 1 EA
27 LABEL 4X12 1 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.

  • 1276974

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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Interest-Free Up To 12M

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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