{"product_id":"manley-chevrolet-small-block-ls3-l99-l92-head-1-6in-head-diameter-severe-duty-exhaust-valves-set-of-8","title":"Manley Severe Duty Exhaust Valves – Chevrolet Small Block LS3\/L99 (L92 Head) | 1.6\" Head","description":"\u003cp\u003eEngine builders working with Chevrolet Small Block LS3\/L99 (L92 Head) can use this Severe Duty exhaust valve family to choose the required valve dimensions while staying within the correct Manley application group. The parent listing is distinguished by \u003cstrong\u003e1.6\"; Head\u003c\/strong\u003e, which should be cross-checked against the rest of the engine combination.\u003c\/p\u003e\u003cp\u003eFor Chevrolet Small Block LS3\/L99 (L92 Head), 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 Small Block LS3\/L99 (L92 Head)\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\u003eTitle Specification:\u003c\/strong\u003e 1.6\"; Head\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 12355-8\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":50207045976314,"sku":"MAN12355-8","price":301.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0325\/6352\/7739\/files\/fec5f7dba71aff461c53f7b003c4211fL_7d8b421f-a7a4-48f3-a3c8-cb1937e7398d.jpg?v=1787979056","url":"https:\/\/lgcracing.com\/products\/manley-chevrolet-small-block-ls3-l99-l92-head-1-6in-head-diameter-severe-duty-exhaust-valves-set-of-8","provider":"Legacy Racing","version":"1.0","type":"link"}