Cylinder heads are warrantied for cracks and warpage. No warranty for any cylinder head sent to a Machine Shop or Machine Shop specifications. This is a good tested used part. If you are looking for a good, used guaranteed item this is the one for you. This is a nice used part ready to be installed in your vehicle. Vehicle has collision damage but the items was untouched in the accident. The part has been stored in our warehouse. This part as well as our other parts have been inspected and tested by a certified mechanic.