{"product_id":"manley-chevrolet-lt-1-1-590-head-diameter-pro-flo-exhaust-valves-set-of-8","title":"Manley Extreme Duty Pro Flo Exhaust Valves – Chevrolet LT - 1 1.590 Head Diameter","description":"\u003cp\u003eFor Chevrolet LT - 1 1.590 Head Diameter cylinder-head work, this Manley Extreme Duty Pro Flo exhaust valve listing groups the available dimensional choices under one application-specific product family. 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 LT - 1 1.590 Head Diameter 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 LT - 1 1.590 Head Diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManley Series:\u003c\/strong\u003e Extreme Duty Pro Flo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Position:\u003c\/strong\u003e Exhaust\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 12349-8\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":50207000953082,"sku":"MAN12349-8","price":514.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0325\/6352\/7739\/files\/fec5f7dba71aff461c53f7b003c4211fL_0886da16-91e9-4c9e-ae77-add4c3d2235c.jpg?v=1787979048","url":"https:\/\/lgcracing.com\/products\/manley-chevrolet-lt-1-1-590-head-diameter-pro-flo-exhaust-valves-set-of-8","provider":"Legacy Racing","version":"1.0","type":"link"}