{"product_id":"new-cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair","title":"NEW CNC Ported LM4\/LM7 706\/862 Cyl Heads .650 Springs 2.00\/1.57 Valves PAIR","description":"\u003cp\u003ePart#: AHP-20314NPC\u003c\/p\u003e\n\u003cp\u003eManufacturer: Allied\/Aftermarket\u003c\/p\u003e\n\u003cp\u003eYear Range: 03-09\u003c\/p\u003e\n\u003cp\u003eEngine Size: 5.3L - V8\u003c\/p\u003e\n\u003cp\u003eDescription: NEW CNC Ported LM4\/LM7 706\/862 PAIR\u003c\/p\u003e\n\u003cp\u003eIntake - 243CC\u003c\/p\u003e\n\u003cp\u003eExhaust - 95CC\u003c\/p\u003e\n\u003cp\u003eCombustion chamber - 62CC\u003c\/p\u003e\n\u003cp\u003eALL Flow data is located in the pictures.\u003c\/p\u003e\n\u003cp\u003eThese are NEW AFTERMARKET CNC-ported heads. They come with the following\u003c\/p\u003e\n\u003cp\u003eNew QualCast 21-4N Stainless Steel Swirl Polished Valves\u003c\/p\u003e\n\u003cp\u003eIntake is 2.00 and Exhaust is 1.57 \u003c\/p\u003e\n\u003cp\u003eNew Qualcast DUAL Springs for up to .650 lift.\u003c\/p\u003e\n\u003cp\u003eNew retainers, spring seats and valve seals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYou may look at other LS heads as well for different applications.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor a little less compression try the 243\/799 heads: \u003ca href=\"https:\/\/www.alliedmotorparts.com\/collections\/performance-heads\/products\/cnc-ported-ls1-ls6-243-799-heads-650-springs-2-02-1-59-valves-pair\"\u003eLS1\/LS6 CNC Ported 243 Heads \u0026amp; 799 Heads for sale – Allied Motor Parts\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor your forced air application try the 317 heads: \u003ca href=\"https:\/\/www.alliedmotorparts.com\/collections\/performance-heads\/products\/lq4-lq9-cnc-ported-317-heads-650-springs-2-02-1-59-valves-pair\"\u003eLQ4\/LQ9 CNC Ported 317 Heads .650 Springs 2.02\/1.59 Valves PAIR – Allied Motor Parts\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eElevate your Chevrolet engine's performance with our meticulously crafted CNC Ported LM4\/LM7 706\/862 Cylinder Heads. Designed for the 5.3L V8 engine (03-09), these heads surpass OEM standards, offering unparalleled power and efficiency.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFeaturing .650 springs and 2.00\/1.57 valves, our ALL-20314PC heads are the ultimate upgrade for enthusiasts aiming for superior performance. Whether you're searching for ported 706 heads, 706 ported heads, or high-quality ported 5.3 heads, we have the perfect solution for you.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eExplore our range of 862 heads for sale, expertly ported to enhance your engine's capabilities. Our dedication to 706 head porting and 862 head porting ensures that you receive heads that maximize your engine's potential.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAt Allied Motor Parts, we take pride in our products and our customers' satisfaction. Our commitment to quality and performance backs our 706 ported heads and 862 heads for sale. We stand behind our products, ensuring you get the best value for your investment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eTrust Chevrolet's legendary quality and our specialized porting expertise to transform your LM4 or LM7 engine. Don't wait—experience the difference with our premium CNC Ported LM4\/LM7 706\/862 Cylinder Heads today!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eReady to make the leap? Contact Allied Motor Parts today for more \u003cstrong\u003e\u003ca href=\"https:\/\/www.alliedmotorparts.com\/collections\/cylinder-heads\"\u003eCylinder Heads\u003c\/a\u003e \u003c\/strong\u003eand\u003cstrong\u003e \u003ca href=\"https:\/\/www.alliedmotorparts.com\/collections\/chevrolet-cylinder-heads\"\u003e\u003cspan\u003eChevy Cylinder Heads\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e options and take the first step towards unlocking your Chevrolet's full potential with our premium ported 706 heads, 706 ported heads, and ported 5.3 heads. Experience the power, efficiency, and reliability that our expertly ported heads provide. Your engine deserves the best—give it the upgrade it needs with Allied Motor Parts.\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003eIf you're looking for help or have any questions, our expert support team is available through our \u003ca href=\"https:\/\/www.alliedmotorparts.com\/pages\/contact-us\"\u003econtact form\u003c\/a\u003e, by phone at \u003ca href=\"tel:866-766-9955\"\u003e866-766-9955\u003c\/a\u003e, or via email at  \u003ca href=\"mailto:sales@alliedmotorparts.com\"\u003esales@alliedmotorparts.com\u003c\/a\u003e. We're dedicated to assisting you every step of the way. For detailed information on cylinder heads, visit our \u003ca href=\"https:\/\/www.alliedmotorparts.com\/blogs\/news\"\u003eblog\u003c\/a\u003e section.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: 400;\"\u003e\u003ca href=\"https:\/\/www.alliedmotorparts.com\/blogs\/news\/chevrolet-cylinder-head-guide\"\u003e\u003cstrong\u003eLearn more about Chevrolet Cylinder Heads\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Cylinder Head has a core charge of $0.00 included in the cost. This charge is FULLY REFUNDED upon return. We will include a prepaid label for the return freight.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0422\/5387\/7406\/files\/LS_706-862_Flow_Data.jpg?v=1786045876\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe cylinder head included in this listing will fit the vehicles listed below. It is also important to review \/ confirm the fitment notes above to assure the vehicle specifics of the head are correct for your application. If you have any question that this may not be the correct head for your vehicle or need help in locating the correct head, please contact us via phone or email prior to making a purchase.\u003c\/p\u003e","brand":"Chevrolet","offers":[{"title":"Default Title","offer_id":48896921010421,"sku":"AHP-20314PC","price":1550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0422\/5387\/7406\/files\/AHP-20314NPC-6.jpg?v=1790017935","url":"https:\/\/www.alliedmotorparts.com\/products\/new-cnc-ported-lm4-lm7-706-862-cyl-heads-650-springs-2-00-1-57-valves-pair","provider":"Allied Motor Parts","version":"1.0","type":"link"}