Cometic Chrysler 361/383/413/440 4.25in Bore .120in MLS Head Gasket C5459-120

Cometic MLS Head Gasket — C5459-120

Chrysler 361 / 383 / 413 / 440 | 4.250" Bore | .120" Thickness

The Cometic C5459-120 MLS head gasket is designed for Chrysler and Dodge B/RB big block wedge V8 engines that require a 4.250" bore and a .120" compressed thickness. Built using Cometic’s multi-layer steel design, this gasket provides reliable sealing for performance, street, or rebuilt engines where durability and consistency matter.

Key Features

• Part number: C5459-120
• MLS (multi-layer steel) construction
• 4.250-inch gasket bore
• .120-inch compressed thickness
• Fits Chrysler/Dodge B & RB big block wedge engines
• Designed to handle higher cylinder pressures and heat than traditional composite gaskets

What’s Included

• One (1) MLS cylinder head gasket
  (Sold individually; hardware not included)

Why Choose This Gasket

This gasket is a solid choice when a specific thickness is needed to set deck height or compression ratio. The MLS construction helps maintain a tight seal over time, especially in engines that see higher temperatures or more aggressive use. It’s commonly used in performance builds as well as properly rebuilt stock engines.

Fitment & Installation Notes

• Fits Chrysler/Dodge B/RB big block wedge V8 engines including 361, 383, 413, and 440
• Designed for engines with a 4.250-inch bore — confirm your bore size before ordering
• Proper surface finish and flatness are important for MLS gaskets
• Head bolts or studs are not included
• Follow factory torque specs and tightening sequence
• Professional installation is recommended for best results

California Proposition 65 Warning:

This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm.