ONAN A054Z621 CYLINDER HEAD - ONAN Genuine OEM Part
ONAN
- Payment methods
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- SKU:
- ONAN A054Z621
- MPN:
- A054Z621
- Condition:
- New
- Availability:
- Ships (leaves our warehouse) within next business day if in stock


Available Inventory
Get what you need quickly with our wide stock and fast shipping.
Competitive Pricing
Enjoy competitive rates and great deals on every order.
Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Verified Genuine ONAN replacement part engineered to exact Cummins standards
- Ensures efficient combustion and maintains engine health for extended service life
- Optimizes fuel economy and supports emissions compliance for environmentally responsible operation
- Designed to uphold system reliability and reduce downtime in critical power applications
ONAN A054Z621 CYLINDER HEAD - Elevate Your Generator’s Heartbeat with ONAN Precision
This cylinder head is fundamental to the seamless operation of your Cummins/Onan generator, ensuring robust engine performance and longevity. Crafted to meet stringent OEM specifications, it facilitates effective heat dissipation and maintains optimal compression under demanding conditions. Upgrade to genuine quality today and maintain your power system’s integrity with confidence.
Performance Promise That Powers Your Peace of Mind
- Certified authenticity guarantees flawless fit and function within your Onan system
- Enhances engine efficiency, contributing to lower operational costs
- Durable design withstands harsh operating environments and prolonged use
- Supports critical power reliability for residential, recreational, or industrial applications
Details
Category: Cylinder Heads
Product SKU: ONAN A054Z621
Our knowledgeable team is committed to guiding you through your purchase, ensuring you select the correct part to restore your generator’s performance. Feel free to reach out via our help center for personalized assistance. We are dedicated to supporting your maintenance success and power continuity with genuine parts you can trust.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov