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Starting @ $12,775
521 Ford stroker crate engine with 575hp, featuring Edelbrock Performer RPM aluminum heads. This Ford 521 575hp stroker crate engine Combination can be custom designed to tailor  to your specific needs. Engine can be custom painted to match your vehicle. We are a direct supplier of the exclusive March Performance serpentine belt system. We can also assist you in choosing the proper transmission and stall speed converter combination for your vehicle and have it shipped directly to you as your performance crate engine is being built.

 

Horsepower 575 @ 
Torque  Ft. Lbs @ 2850 RPM
Bore & Stroke 4.360 - 4.300

 

 

Stock Product Return Policy:

There is a 25% restocking cost assessed on most returns; Other manufacturers for which we are authorized dealers, may charge more. Proformance Unlimited inc. return policy for products and materials produced by outside services is subject to the terms and conditions imposed by these manufacturers, and in no way circumvents the 5-day time limit from date of sale. 
 

Shipping costs to you and shipping returns back are your responsibility. Damaged items returned are not credited, so insure your package. Items not returned within seven (7) days are considered sold and final.

***Please inspect your engine upon delivery…You MUST note ANY damages to shipment with carrier or your claim can be denied.*** 

NOTEWe do not accept return packages without a valid RA number, and we do not accept postage-due or C.O.D. packages at any time for any reason.
 

Completeness of returned product and its suitability for resale is evaluated upon receipt of merchandise.Incomplete or damaged product(s) cannot be credited. Items returned after seven (7) days are prorated for wear, and cannot be resold as new. Regarding suitability of a product: It is buyer's responsibility to do due diligence prior to purchase.

If you are unhappy with your purchase and feel the purchased item was misrepresented, contact Proformance Unlimited inc. Customer Service immediately during regular business hours, Monday through Friday from 7:00 am to 5pm (excluding holidays) Eastern standard time, and we will do whatever we can to make your order correct.
 

Custom Products Policy:

Custom built engines are not returnable; items other than "off the shelf" products (Engines) are considered custom. Contact us within 24 hours to report any problems. Custom products, by their nature, are products and materials which have been assembled to your order specifications, and are neither returnable nor refundable.

*Our Warranty is available online for review*

*Any Engine Modifications Must Be In Writing*

*There Will Be No Price Adjustments After 7 Days From Your Initial Deposit*

Order Cancellation Policy:


Canceling orders placed in the previous 5 days (stock items only). If you must cancel an order for a custom item, be aware that you are responsible for costs associated with your order to the point of cancellation: processing, designing and contracting that are as a result of your order, and charges for which may have already accrued, including shipping and return shipping. Cancellations for orders of stock items (an inventoried item) must be received prior to our shipping a part or all of the order, or a handling and return/restock fee will accrue. Custom built engine cancellation: Canceling any or all of a custom order (as defined by Proformance Unlimited inc.) accrues handling, processing, contracting, design department time, if any, and, any and all materials used, and any and all production time used, at any point no less than 25% of the cost of the custom item. Cancellations must be in writing and customer must contact us by phone. Specify order number and reason for cancellation request. Once a product has been assembled, The sale is by Proformance Unlimited Inc. considered to be final. No refunds will be issued. (See Custom Products Policy)
 

Proformance Unlimited Privacy Policy

Thank you for visiting our web site. This privacy policy tells you how we use personal information collected at this site. Please read this privacy policy before using the site or submitting any personal information. By using the site, you are accepting the practices described in this privacy policy. These practices may be changed, but any changes will be posted and changes will only apply to activities and information on a going forward, not retroactive basis. You are encouraged to review the privacy policy whenever you visit the site to make sure that you understand how any personal information you provide will be used.


Note: The privacy practices set forth in this privacy policy are for this web site only. If you link to other web sites, please review the privacy policies posted at those sites.

Collection of Information
We collect personally identifiable information, like names, postal addresses, email addresses, etc., when voluntarily submitted by our visitors. The information you provide is used to fulfill you specific request. This information is only used to fulfill your specific request, unless you give us permission to use it in another manner, for example to add you to one of our mailing lists.

Cookie/Tracking Technology
The Site may use cookie and tracking technology depending on the features offered. Cookie and tracking technology are useful for gathering information such as browser type and operating system, tracking the number of visitors to the Site, and understanding how visitors use the Site. Cookies can also help customize the Site for visitors. Personal information cannot be collected via cookies and other tracking technology, however, if you previously provided personally identifiable information, cookies may be tied to such information. Aggregate cookie and tracking information may be shared with third parties.

Distribution of Information
We may share information with governmental agencies or other companies assisting us in fraud prevention or investigation. We may do so when: (1) permitted or required by law; or, (2) trying to protect against or prevent actual or potential fraud or unauthorized transactions; or, (3) investigating fraud which has already taken place. The information is not provided to these companies for marketing purposes.

Commitment to Data Security
Your personally identifiable information is kept secure. Only authorized employees, agents and contractors (who have agreed to keep information secure and confidential) have access to this information. All emails and newsletters from this site allow you to opt out of further mailings.

Privacy Contact Information
If you have any questions, concerns, or comments about our privacy policy you may contact us using the information below:

By e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
By Phone: 800-267-3940