{"product_id":"manley-chevrolet-big-block-1-880-head-diameter-5-354-overall-length-severe-duty-exhaust-valves-set-of-8","title":"Manley Severe Duty Exhaust Valves – Chevrolet Big Block 1.880 Head Diameter. 5.354 Overall Length","description":"\u003cp\u003eEngine builders working with Chevrolet Big Block 1.880 Head Diameter. 5.354 Overall Length can use this Severe Duty exhaust valve family to choose the required valve dimensions while staying within the correct Manley application group. Use the exact Manley part number shown below to distinguish this product from similar valves offered for the same or related engine family.\u003c\/p\u003e\u003cp\u003eThe correct Chevrolet Big Block 1.880 Head Diameter. 5.354 Overall Length valve is the one that matches the finished head. Stem clearance, seat contact, installed height, spring package, and keeper location should all be checked during assembly.\u003c\/p\u003e\u003ch3\u003eKey Product Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chevrolet Big Block 1.880 Head Diameter. 5.354 Overall Length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManley Series:\u003c\/strong\u003e Severe Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Position:\u003c\/strong\u003e Exhaust\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family Detail:\u003c\/strong\u003e Severe Duty application focus\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 11563-8\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Quantity\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSet of 8 valves.\u003c\/strong\u003e The selected configuration is supplied as a 8-piece valve package. This quantity applies to the selected Manley SKU family shown on this product page.\u003c\/p\u003e\u003ch3\u003eSelection \u0026amp; Fitment Notes\u003c\/h3\u003e\u003cp\u003eValve fitment should be verified from the cylinder head itself; check the required head size, stem size, overall length, seat work, and valvetrain geometry rather than relying on engine name alone.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProfessional engine assembly and measurement are recommended. Product specifications should be confirmed against the selected Manley part number and the requirements of the exact engine build.\u003c\/em\u003e\u003c\/p\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":50207018811642,"sku":"MAN11563-8","price":301.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0325\/6352\/7739\/files\/639c017773af16048d25285e221903acL_96aba7aa-1bde-4cff-a1b8-af54c2222826.jpg?v=1787802396","url":"https:\/\/lgcracing.com\/products\/manley-chevrolet-big-block-1-880-head-diameter-5-354-overall-length-severe-duty-exhaust-valves-set-of-8","provider":"Legacy Racing","version":"1.0","type":"link"}