All parts are backed by the limited warranty extended by the parts' manufacturer. Parts returned for warranty will be exchanged or credited at our option. Full Line Exhaust or the manufacturer will not back warranty requests due to shipping damage, improper handling, improper installation, abuse, neglect or accidents. Warranty claims apply to parts only, and do not cover labor, installation, towing or any other charges. No product is to be returned to Full Line Exhaust without written authorization from Full Line Exhaust. Warranty parts when required are to be returned to Full Line at purchaser's expense.