{"product_id":"manley-chevrolet-big-block-exhaust-valve-kit-1-940in-head-diameter-5-422in-overall-length-0-3415in-stem-3","title":"Manley Extreme Duty Exhaust Valves – Chevrolet Big Block | 1.940\" Head | Part #11773-8","description":"\u003cp\u003eThis Extreme Duty exhaust valve listing is organized specifically for Chevrolet Big Block, with the available dimensions presented as selectable configurations for easier cylinder-head planning. The parent listing is distinguished by \u003cstrong\u003e1.940\"; Head \/ Part #11773-8\u003c\/strong\u003e, which should be cross-checked against the rest of the engine combination.\u003c\/p\u003e\u003cp\u003eFor Chevrolet Big Block, valve diameter changes can alter seat work and chamber\/shrouding relationships, while alternate overall lengths can change installed height and rocker geometry.\u003c\/p\u003e\u003ch3\u003eKey Product Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chevrolet Big Block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManley Series:\u003c\/strong\u003e Extreme Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Position:\u003c\/strong\u003e Exhaust\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitle Specification:\u003c\/strong\u003e 1.940\"; Head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitle Specification:\u003c\/strong\u003e Part #11773-8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 11773-8\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\u003eUse the finished cylinder-head setup as the authority for selection. Oversize valves or alternate lengths may require machining and can affect installed height and valvetrain geometry.\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":50207043911930,"sku":"MAN11773-8","price":514.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0325\/6352\/7739\/files\/1ecc177028ebb28898eba0253019ba05L_4c44ab36-2d53-4ca3-bd92-fc2811099f26.jpg?v=1787802631","url":"https:\/\/lgcracing.com\/products\/manley-chevrolet-big-block-exhaust-valve-kit-1-940in-head-diameter-5-422in-overall-length-0-3415in-stem-3","provider":"Legacy Racing","version":"1.0","type":"link"}