{"product_id":"gm-delco-moraine-5459817-904-y-brake-cylinder-repair-kit-nos","title":"GM \/ Delco Moraine 5459817 (904‑Y) Brake Cylinder Repair Kit – NOS","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGM \/ Delco Moraine 5459817 (904‑Y) Brake Cylinder Repair Kit – NOS\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGenuine New Old Stock Delco Moraine \u003cstrong\u003e904‑Y\u003c\/strong\u003e wheel‑cylinder rebuild kit for late‑1950s and early‑1960s GM full‑size models. Correct for \u003cstrong\u003e1959–62 Chevrolet\u003c\/strong\u003e (Biscayne, Bel Air, Impala) and \u003cstrong\u003e1959–62 Pontiac\u003c\/strong\u003e (Catalina, Star Chief) front wheel cylinders using the 1\" bore design. This 904‑Y variant is a later GM service‑replacement kit for 904‑R and 904‑Z.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eDetails:\u003c\/strong\u003e • GM Part: 5459817 • Delco Code: 904‑Y • Application: Front wheel cylinders (1\") • Models: Chevrolet \u0026amp; Pontiac full‑size, 1959–62 • Condition: NOS, stored in climate‑controlled inventory\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA scarce late‑production Delco brake component—excellent for restoration‑grade builds.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGM \/ Delco Moraine 5459817 – 904‑Y\u003c\/strong\u003e is a \u003cstrong\u003e1-inch front wheel‑cylinder rebuild kit\u003c\/strong\u003e in the same family as 904‑R and 904‑Z. The \u003cstrong\u003e904‑Y\u003c\/strong\u003e suffix indicates a \u003cem\u003elater-production service variant\u003c\/em\u003e—usually a rubber‑compound or spring‑geometry update used by GM in the early 1960s. This makes 904‑Y a desirable NOS kit, especially when boxed cleanly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003e904‑Y part identity\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGM Part:\u003c\/strong\u003e 5459817 \u003cstrong\u003eDelco Moraine Kit:\u003c\/strong\u003e \u003cstrong\u003e904‑Y\u003c\/strong\u003e \u003cstrong\u003eType:\u003c\/strong\u003e Front wheel‑cylinder repair kit \u003cstrong\u003eBore Size:\u003c\/strong\u003e \u003cstrong\u003e1\"\u003c\/strong\u003e \u003cstrong\u003eEra:\u003c\/strong\u003e 1959–1962 primary applications, with 1963–64 dealer supersession \u003cstrong\u003eTypical contents:\u003c\/strong\u003e Rubber cups, boots, spring, retainers, piston seals\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 904‑series replaced many 901‑series kits and was later superseded by 905‑series equivalents.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eFitment chart\u003c\/h3\u003e\n\u003ch4\u003eChevrolet – Full‑Size (Front Wheel Cylinders)\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1959 Biscayne \/ Bel Air \/ Impala\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1960 Biscayne \/ Bel Air \/ Impala\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1961 Biscayne \/ Bel Air \/ Impala\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1962 Biscayne \/ Bel Air \/ Impala\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePontiac – Full‑Size (Front Wheel Cylinders)\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1959 Catalina \/ Star Chief\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1960 Catalina \/ Star Chief\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1961 Catalina \/ Star Chief\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1962 Catalina \/ Star Chief\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNotes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e904‑Y is a \u003cstrong\u003edirect functional replacement\u003c\/strong\u003e for 904‑R and 904‑Z.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSome GM dealer catalogs list 904‑Y as the \u003cstrong\u003epreferred service kit\u003c\/strong\u003e for 1963–64 full‑size models still using the 1\" cylinder.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe “Y” suffix typically indicates a \u003cstrong\u003erubber‑compound update\u003c\/strong\u003e or \u003cstrong\u003espring‑style revision\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"CorvairFarmer","offers":[{"title":"Default Title","offer_id":48676059447547,"sku":null,"price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/3740\/8251\/files\/aa1_32dde740-1d73-4884-9863-25d5e234bba0.jpg?v=1775945240","url":"https:\/\/corvairfarmer.com\/products\/gm-delco-moraine-5459817-904-y-brake-cylinder-repair-kit-nos","provider":"CorvairFarmer","version":"1.0","type":"link"}