Here is Edelbrock's shock warranty statement:
"Edelbrock IAS® Strut & Shock Absorber Limited Lifetime Warranty
Edelbrock Corporation guarantees for a limited lifetime each new Edelbrock IAS Strut & Shock Absorber to be free from factory defects (except for finish and shock boot) from date of purchase, provided that the product is properly installed, subjected to normal use and service and that the product is not modified or changed in any way, negligence by customer or installer, or used for racing or competition purposes. Should a part become defective, it should be returned to the original selling dealer or shipped freight prepaid to Edelbrock Corporation. It must be accompanied with the sales receipt and a clear description of the problem. This warranty is void on shocks used in racing applications except for known, proven defects in material or workmanship.
Edelbrock Corporation reserves the right to replace or repair the defective part and return said part freight prepaid. This warranty covers the replacement or repair of the product only and does not cover the cost of removal and installation.
Damage or defects resulting from collision, improper installation, off-road use, road hazards or racing, are not covered by this warranty. The warranty for Edelbrock IAS Struts & Shock Absorbers extends only to the original purchaser only for the lifetime of the original vehicle in which it is installed."