FOR SALE today are 6- DD/GM RING SET Pt# 519-3477. Please ask all questions before you purchase. Not a cheap knock off……. New old stock. 6 sets for 6 cylinders. These are Detroit Diesel/ General Motors manufactured rings, notice the 8-sided spring in the photo. Each ring was removed and inspected, sprayed and wrapped to await sale. I also have single sets available for sale in my ebay store. SHIPPING: I will Ship this item in the USA for FREE…..International buyers must purchase this item through eBay’s Global Shipping Program. I have a large selection of OEM CAT parts listed in my eBay store (Jeff’s Clearinghouse) with more to follow. Thanx for stopping by and good luck.