Cummins ISX Cylinder Head | PN CM5529502

You have 30 calendar days to return an item from the date you received it. To be eligible for return all parts must meet the following conditions:
• The item must be new, unused, and uninstalled;
• The product must be in salable condition, with no signs of installation (e.g., grease, scratches, or missing components);
• Original packaging is required, especially for branded parts;
• Any item that has been installed, modified, or misused is not eligible for return;
• Unacceptable returns may be shipped back to the customer upon request, at the customer's expense;
• Your item needs to have the receipt or proof of purchase.
We have a Restocking Fee which applies for return items with damaged package. Restocking Fee is 25%-50% of initial purchase.
• Do not tape the original packaging box — Restocking Fee will apply;
• Do not stick any shipping label/sticker on the original packaging box — Restocking Fee will apply;
• We recommend using stretch film to wrap the original packaging box. Use an additional shipping box or envelope to return the item.
You will be responsible for paying your own shipping costs for returning your item. Shipping costs are nonrefundable.

Free Standard Shipping — $0 on orders $149.99+ (3-5 business days)
Express Shipping available at checkout (1-2 business days)
Guaranteed Overnight Shipping available at checkout — order before 2 PM PST (Monday–Friday)
International shipping available to Canada and EU — rates calculated at checkout.
All orders processed within 1 business day (excluding Sunday and holidays).

This OEM replacement part maintains the correct operation of a critical engine or vehicle system. Replace at the first sign of failure to prevent damage to connected components and maintain vehicle reliability and uptime. Genuine Cummins part — engineered for Cummins engines for exact fit and performance.

Q: Which trucks does this part fit?
A: Fits Cummins ISX / X15 engines. Verify your specific model and year before ordering. Contact us with your VIN for fitment confirmation.

Q: When should this part be replaced?
A: Replace at manufacturer-recommended service intervals or at first sign of failure symptoms. Refer to your truck maintenance schedule.

Q: Is this OEM or aftermarket quality?
A: Genuine Cummins part — engineered for Cummins engines for exact fit and performance.

Q: What are the symptoms of failure?
A: Yes. Failure of this component can cause damage to connected systems and engine components. Replace at first sign of issues.

Q: What is included?
A: Complete CUMMINS assembly, ready for installation. All necessary hardware and seals included where applicable.