Classic Diesel Designs

7.3L/6.9L IDI Intake Manifold Gasket

$157.30

SKU: 1805389C3

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Classic Diesel Designs intake manifold gasket is a new replacement valley pan gasket specifically designed for 7.3L and 6.9L IDI engines. This gasket is manufactured in the USA and features a robust solid bonded carbon steel frame for durability. Enhancing performance and longevity, this gasket is treated with a PTFE non-stick coating, which helps prevent sticking and facilitates easier removal during future maintenance. It also incorporates an updated "factory turbo" baffling design, optimized for engines equipped with turbochargers. This gasket is compatible with Navistar part numbers 1805389C3, 5389C2, 1805389C1, and 1805389, as well as Mack part number 4333-1805389C3 and PAI part number 431377. It is a direct replacement for the original equipment. For those undertaking a comprehensive engine reseal, this gasket can be purchased for a reduced price of $100 when included in the 6.9/7.3 IDI Engine Reseal Kits offered by Classic Diesel Designs.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandClassic Diesel Designs
Part Number1805389C3
CategoryAir and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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