Cummins ISB 6.7L Engine Rebuild Kit, New (4376345)

New Engine Overhaul Kit for Cummins ISB 6.7L Diesel Engines, Part Number 4376345

Why Choose This Cummins ISB 6.7L Rebuild Kit From 4BTdiesel?

• Every component in the kit is brand new, never used or refurbished
• Built to OEM specifications and tolerances in an ISO 9001 certified facility
• No core charge required, so there is nothing to return and no extra deposit to manage
• Backed by a 6-month warranty from 4BTdiesel
• Available in standard and undersized bearing options to match your specific engine condition
• Cross references OEM part numbers 4376345 and OH4376345

Why a Quality Rebuild Kit Matters for Your ISB 6.7L

Every diesel engine reaches the point where it needs an overhaul. Worn piston rings lead to blowby, low compression, and oil consumption. Worn bearings allow excessive crankshaft movement that accelerates internal damage. When your Cummins ISB 6.7L starts showing these signs, a full rebuild kit is the right answer, not a collection of individual parts sourced from different suppliers with no guarantee of consistency. The question is not whether to rebuild, it is what kit you trust to get the job done right.

One thing many shops do not realize is that some OEM overhaul kits include used or reconditioned components. At 4BTdiesel, every part in this rebuild kit is new. That means your freshly rebuilt ISB 6.7L starts its next service life with new pistons, new bearings, new gaskets, and properly sealed surfaces from day one, not parts that have already seen heat cycles and wear.

What Is Included in This Cummins ISB 6.7L Rebuild Kit

This kit covers the major wear items needed for a complete ISB 6.7L engine overhaul. It includes six piston kits (4376345), twelve connecting rod bearings (4893693 / 3969562), one main engine bearing kit (4955352), one lower engine gasket set (4376091), one upper engine gasket set (4376090), and a product box for organized storage and transport during the rebuild.

Rod bearing size and main bearing size are both required selections at checkout, with options including standard, .010, .020, .025, .030, and .50 to accommodate engines that have been previously machined or are being built to a specific dimension. Selecting the correct sizes for your application is critical, and 4BTdiesel’s professionally certified factory mechanics can help you determine the right spec before you order.

This kit weighs 40 lbs and ships in a 44 by 14 by 14 inch package. Because diesel engine parts are engine specific, entering your Engine Serial Number or VIN on the product page before ordering allows 4BTdiesel to confirm this kit is the correct fit for your ISB 6.7L application.

Get Your Cummins ISB 6.7L Rebuild Kit From 4BTdiesel

At $1,276.65 with no core charge and same-day shipping on in-stock orders placed by 2PM EST, this rebuild kit is a straightforward, high value choice for any shop or owner-operator overhauling a Cummins ISB 6.7L. Financing is available through PayPal Pay Later and Sezzle for qualified buyers, making it easy to move forward with your rebuild without delay.

Order your Cummins ISB 6.7L Engine Rebuild Kit (4376345) from 4BTdiesel today.

FAQs About Cummins ISB 6.7L Engine Rebuild Kit (4376345)

1. What engines does rebuild kit 4376345 fit?

This kit is built for Cummins ISB 6.7L diesel engines. 4BTdiesel recommends submitting your Engine Serial Number or VIN before ordering so our team can confirm this is the correct overhaul kit for your specific engine build.

2. What is included in the 4376345 rebuild kit?

The kit includes six piston kits (4376345), twelve connecting rod bearings (4893693 / 3969562), one main engine bearing kit (4955352), one lower engine gasket set (4376091), one upper engine gasket set (4376090), and a product box. It covers all of the major wear components needed for a complete ISB 6.7L overhaul.

3. Are the parts in this rebuild kit new or used?

Every component in this kit is brand new. 4BTdiesel uses only new, high quality parts built to OEM specifications and tolerances, unlike some OEM kits that may include reconditioned or used components.

4. What bearing sizes are available?

Both rod bearing size and main bearing size are required selections at checkout. Available sizes are standard, .010, .020, .025, .030, and .50 to accommodate engines at different stages of wear or machining. If you are unsure which size your engine requires, 4BTdiesel’s professionally certified factory mechanics can help you determine the correct specification.

5. Is there a core charge on this rebuild kit?

No. This kit carries zero core charge, which means there is nothing to return and no additional deposit to manage. You pay for the kit and get everything you need to complete your rebuild.

Warranty

6-month warranty.

7. What are the signs that my ISB 6.7L needs a rebuild?

Common indicators include excessive oil consumption, low compression readings across cylinders, blowby at the crankcase breather, knocking sounds from the bottom end, and a significant drop in power or fuel efficiency. Any combination of these symptoms points to worn internal components that a full overhaul with fresh parts can address.

8. How fast will this kit ship?

In-stock orders placed by 2PM EST ship the same day, Monday through Friday. The kit weighs 40 lbs and ships in a 44 by 14 by 14 inch package via UPS or FedEx.

9. Can I finance this purchase?

Yes. 4BTdiesel offers financing through PayPal Pay Later and Sezzle at checkout. PayPal Pay Monthly offers 3, 6, 12, or 24 month payment plans with $0 down for qualified buyers, making it easier to get your rebuild started without waiting on budget.

10. Can 4BTdiesel help me confirm the right bearing sizes before I order?

Yes. 4BTdiesel’s professionally certified factory mechanics are available to review your engine specifications, machining history, and any measurements you have taken to help you select the correct rod and main bearing sizes for your ISB 6.7L rebuild.

What Rebuild Kit and Gasket Set Includes