GM LT1 Gen V D.I. style cylinder heads.
Holley Performance Products, Inc. products are warranted to be free from defects in material and workmanship for a period of 90 days from the date of purchase, except Avenger series carburetors, which carry a lifetime warranty on parts and a one-year warranty on labor. Any Holley deep cell battery also carries a one-year warranty. For select carburetors and superchargers, there will be a core charge. If the part qualifies, there will be a letter and a call tag included in the box from Holley.
The part must be returned to Holly, and if it is in acceptable condition, Holly will issue credit directly to the customer. In addition, Holley Performance Products, Inc.'s limited warranty specifically does not apply to products which have been modified or altered in any way, subjected to adverse conditions such as misuse, neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than those recommended by Holley Performance Products, Inc. This warranty does not warrant and disclaims all liability for products used in racing activities and/or applications, other than those specifically recommended by Holley Performance Products, Inc.