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A copy of our terms and conditions can be found here.

Limited Warranty

Unless otherwise specified no warranty is expressed or otherwise implied for Mast Motorsports products.  Due to the nature of motorsports and racing we do not offer a product warranty unless otherwise noted.

Component Workmanship limited Warranty 

Mast Motorsports offers a workmanship guarantee that applies to engines and components specifically manufactured by Mast Motorsports LLC.  Whereas, Mast will fix, replace, or substitute components it expressly manufactures in case of workmanship flaws.  This applies to Mast manufactured components for 6 months after sales invoice date.  No refunds or exchanges on engines or components allowed.  This limited warranty does NOT apply to components purchased from vendors or other manufacturers.

Engine Workmanship Limited Warranty

 Engines assembled, machined, & tested by Mast Motorsports are warranted against workmanship issues or failures for 12 months after final invoice date.  

Due to the vast nature of components used, Mast cannot warrant component failures.  Due to the nature of racing and competition use, this warranty does not apply to engines used in racing or competitive motorsports activities, or engines rated above 750 HP.  The limited warranty only applies to engines completely assembled and dyno tested by Mast Motorsports.  No warranty expressed or implied on partial engines, short blocks, or other partial assemblies of engine components.

It is highly recommended that our customers use only Mast Motorsports Approved oil where applicable, failure to do so may void any and all warranties.  Contact Mast for a list of approved oil.

All Limited Warranties are non-transferable, without written approval by Mast Motorsports. 

Any agreed upon warranty will be covered by replacement components or any combination of labor and components.  No refunds will be given.

For warranty claims, customer must provide in writing, within 30 days of issue, a statement of the issue, supporting pictures of issue(s), original sales receipt, mileage of engine, proof of proper oil & oil changes.

Mast is not liable for any subsequent damages to property, equipment, or related hardware.