5P1221 | Caterpillar D343/D346/D348/D349 Cylinder Head Gasket Set, New

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5P1221 | Caterpillar D343/D346/D348/D349 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-5P1221 — Gasket Kit - Cylinder Head
Line No Kit Item No Item Name Qty UOM
1 M-4H2496 Sleeve 1 EA
2 M-5H1039 Seal - O-ring 4 EA
3 M-0L364 Lock 17 EA
4 M-4L4412 Gasket 1 EA
5 M-4L8337 Seal - O-ring - Air Compressor 2 EA
6 M-5L5032 Seal - O-ring 1 EA
7 M-6B9186 Gasket - Weight Group 1 EA
8 M-6L2723 Gasket 1 EA
9 M-6L2732 Gasket 2 EA
10 M-6L2780 Gasket 1 EA
11 M-6L3184 Gasket 1 EA
12 M-6L4907 Gasket 2 EA
13 M-6L4911 Gasket 1 EA
14 M-6L4915 Gasket 1 EA
15 M-6L6580 Gasket 2 EA
16 M-2M5173 Seal - Turbocharger Flange 1 EA
17 M-2M6203 Gasket 6 EA
18 M-2M8089 Gasket 1 EA
19 M-4M8210 Lock 1 EA
20 M-2B1738 Lock - Screw 1 EA
21 M-5M1868 Seal - O-ring 6 EA
22 M-5M1902 Gasket 1 EA
23 M-5M9419 Gasket 1 EA
24 M-5M9421 Gasket 1 EA
25 M-7M7224 Gasket 1 EA
26 M-7M7226 Gasket 1 EA
27 M-7M7273 Gasket - Turbocharger 1 EA
28 M-8M904 Gasket - Oil Lines Group 1 EA
29 M-9M2678 Gasket 1 EA
30 M-1P6857 Gasket 1 EA
31 M-4F5639 Gasket 1 EA
32 M-1S4810 Gasket - Turbocharger Oil Supp 2 EA
33 M-1S6595 Gasket - Turbocharger Oil Supp 1 EA
34 M-3S5496 Seal - O-ring 2 EA
35 M-8S9988 Shim - Head Gasket 1 EA
36 M-9S5747 Seal 24 EA
37 M-4F9653 Seal - Cover Group 6 EA
38 M-2A5328 Lock 2 EA
40 M-3S9686 Gasket - Cylinder Head 1 EA
41 M-9F5940 Gasket 1 EA
42 M-2H3088 Seal - O-ring 2 EA
43 M-2H3933 Seal - Hydraulic 1 EA
44 M-4H2494 Sleeve 2 EA
44.01 CG71 PR 1 EA
45 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.

  • 5P1221

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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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