6V6377 | Caterpillar 6.25"/D353/D379/D398/D399 Central & Lower Gasket Set, New

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6V6377 | Caterpillar 6.25"/D353/D379/D398/D399 Central & Lower 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-6V6377 — Gasket Kit - Central and Lower
Line No Kit Item No Item Name Qty UOM
1 M-1A7427 Lock - Nut 7 EA
2 M-4L7586 Gasket 1 EA
3 M-4L7631 Gasket 1 EA
4 M-4L8149 Gasket 7 EA
5 M-4L8176 Gasket 1 EA
6 M-5B6031 Gasket 2 EA
7 M-5B8932 Gasket 1 EA
8 M-6F7557 Gasket 1 EA
9 M-6L1651 Seal - O-ring 13 EA
10 M-6L5889 1 EA
11 M-1F3131 Gasket 3 EA
12 M-7B9457 Lock - Nut 2 EA
13 M-7H9832 Lock - Nut 6 EA
14 M-7L3111 Gasket 2 EA
15 M-8F8682 Lock - Screw 3 EA
16 M-8L5457 Gasket 1 EA
17 M-9M1367 Lock - Bolt 4 EA
18 M-1F4419 Gasket 6 EA
19 M-1F9223 Gasket - Cylinder Block Side C 6 EA
20 M-3F4550 Lock 12 EA
21 M-3N9075 Gasket 1 EA
22 M-3P648 Seal - O-ring 1 EA
23 M-3P656 Seal - Oil Lines 1 EA
24 M-4H2494 Sleeve 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.

  • 6V6377

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