1S0850 | Caterpillar 6.25"/D353/D379/D398/D399 Cylinder Head Gasket Set, New

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1S0850 | 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-1S0850 — Gasket Kit - Cylinder Head
Line No Kit Item No Item Name Qty UOM
1 M-2A774 8 EA
2 M-3S9643 Seal - Thermostat 4 EA
3 M-4L8337 Seal - O-ring - Air Compressor 2 EA
4 M-4L9169 Gasket 2 EA
5 M-5H7704 Seal - O-ring 2 EA
6 M-5H8331 Gasket - Elbow 2 EA
7 M-5L8817 Gasket 4 EA
8 M-6L1576 8 EA
9 M-6L3352 Gasket 4 EA
10 M-6L4497 Gasket 4 EA
11 M-2A3278 Gasket 2 EA
12 M-7B280 Seal 4 EA
13 M-1S4295 Gasket - Turbocharger 2 EA
14 M-1S6595 Gasket - Turbocharger Oil Supp 1 EA
15 M-8F4994 Seal - O-ring 8 EA
16 M-8F9206 Seal - O-ring 16 EA
17 MCB6B6224 Ferrule and Seal Assy 32 EA
18 M-8N7780 Shield 8 EA
19 M-2H3927 Seal - Hydraulic 8 EA
20 M-4H5952 Gasket 8 EA
21 M-4L3020 Gasket 8 EA
22 M-4L6145 Gasket 6 EA
23 M-3N3220 Gasket - Cylinder Head 4 EA
24 M-4L7907 Gasket 2 EA
25 M-4L8097 Gasket 8 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.

  • 1S0850

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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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