4983298 | Cummins ISB 24V 6.7L Loaded Complete Reinforced New Cylinder Head | 3977221

Cummins ISB 24V 4983298 3977225 6.7L Loaded Complete Reinforced New Cylinder Head

Fits: Cummins ISB 24V 6.7L engines
Displacement: 6.7L
Year Range: 2004-Present
Cylinders: 6

Parts Interchange:
3977225, 3977221, 4983298, 4983046

Product Information

Introducing Heavy Duty Parts Company’s reinforced, redesigned, and reinvigorated brand new cylinder head for the industry’s workhorse, the Cummins ISB. Our cylinder head has been redesigned to address common flaws such as cylinder head cracking and premature valve train failure. This heavy-duty aftermarket casting is thicker internally in the crack-prone areas and contains a higher nickel content in the cast iron. The cylinder head comes fully assembled with valves, springs, retainers, valve locks, new high-temperature Viton valve stem seals, and standard size cam bearings. It is ready to install straight out of the box and built to outwork the rest with Heavy Duty Parts Company’s best!

Overview

Upgrade your Cummins ISB 24V 6.7L engine with the top-of-the-line Cummins ISB 24V 3977225 Loaded Complete Reinforced New Cylinder Head. Specifically designed to enhance durability and performance, this cylinder head addresses common issues such as cracking and premature valve train failure, making it an ideal choice for heavy-duty applications from 2004 to present.

Key Features

Reinforced Design:
Features a thicker casting in crack-prone areas and high nickel content in the cast iron, ensuring exceptional strength and longevity.

Premium Components:
Pre-loaded with high-quality valves, springs, retainers, valve locks, high-temperature Viton valve stem seals, and standard size cam bearings.

Ready to Install:
Fully assembled and ready for immediate installation, simplifying the replacement process and reducing downtime.

Compatibility:
Fits Cummins ISB 24V 6.7L engines (2004-Up) including both electronic and non-electronic variations.

Engine Type:
Diesel

Displacement:
6.7 liters.

Cylinders:
6

Core Return Required

Benefits

Enhanced Durability:
The reinforced construction significantly reduces the likelihood of cracking and other common failures.

Improved Performance:
Optimized for better airflow and combustion, leading to increased engine efficiency and power.

Ease of Installation:
Pre-assembled with essential components, ensuring a hassle-free installation process and immediate performance benefits.

Purchase Information

Maximize the performance and durability of your Cummins ISB engine with this robust and reliable cylinder head.

Purchase and Shipping

We offer competitive pricing, and fast handling and shipping times. For more information on shipping times and costs, please visit our shipping policy page here: Shipping Policy.

Additional Info

Check out Cummins Official Website here.

Core Return Required

Heavy Duty Parts Company – Core Returns Policy

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads to our customers. These returned cores supply essential components, such as keepers, springs, and retainers, which are critical to engine performance.

No Core Charge – Just Send It Back!

Unlike other companies, we do not charge a core fee upfront. Instead, we rely on our customers to return their used cores to keep our supply chain running smoothly.

Why Core Returns Matter

• Many small but essential parts from cores are reused to maintain OEM-quality cylinder heads.
• Returning cores keeps prices competitive by reducing the need for costly new components.
• It supports sustainability by minimizing waste and conserving resources.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!