{"title":"Hemi Rocker Arm System","description":null,"products":[{"product_id":"ra-46080bp","title":"Manton's Fathead Hemi - High Ratio Rocker Arm System (Raised Exhaust)","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManton Fathead Hemi High Ratio Rocker Arm System ( Raised Exhaust Shaft )\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e Explore the Fathead Rocker Arm Assembly with High Ratio Stands and Tool Steel 1.8 BP INT \u0026amp; 1.7 BP EXH (with raised exhaust shaft).\u003c\/p\u003e\u003cp\u003e Intake Ratio: 1.8 Exhaust Ratio: 1.7 Our goal is to deliver valvetrain solutions that excel in performance, reliability, and durability, especially in applications pushing beyond 10,000+ RPM. Addressing critical design challenges, we focused on enhancing: \u003cstrong\u003eRocker Arm Geometry:\u003c\/strong\u003e Precision in rocker arm geometry is crucial at high RPMs. We meticulously corrected and optimized our rocker arm assemblies to ensure optimal engine performance and longevity. \u003cstrong\u003eOil Transfer and Leakage Prevention:\u003c\/strong\u003e Featuring forced oiling via the fourth cam bearing. Our design ensures consistent lubrication to both shafts. Tight tolerances between rocker arm stands and shafts minimize oil spillage and pressure loss. Transitioning from stock to Manton assemblies typically increases oil pressure by 10 to 15 pounds without the need for restrictor jets. \u003cstrong\u003eStrength, Stability, and Durability:\u003c\/strong\u003e Incorporating load screws at each rocker arm significantly enhances assembly strength. Heavy-duty shafts and precise material selection further reinforce durability. Rigorously tested in race day environments and labs, our assemblies maintain valve train control even at speeds exceeding 11,200+ RPM. Therefore, extending the service life of components like valve springs and roller lifters. \u003cstrong\u003eOur stands are categorized into Low and High ratios based on exhaust rocker arm ratios: Low (1.6 to 1) and High (1.7 to 1), while the intake ratio remains consistently high at 1.8.\u003c\/strong\u003e \u003cstrong\u003eDiscover why precision engineering matters with our Fathead Rocker Arm Assembly, crafted for unmatched performance and reliability in demanding racing scenarios.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Manton Rocker Arms","offers":[{"title":"Default Title","offer_id":67809861337287,"sku":"RA 46080BP","price":6232.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/1953\/2743\/files\/RA-46080-BP-3-scaled.webp?v=1790952190"},{"product_id":"ra-47080bp","title":"Manton's Fathead Hemi - Low Ratio Rocker Arm System (Raised Exhaust)","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManton Fathead Hemi Low Ratio Rocker Arm System ( Raised Exhaust Shaft )\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eExplore the Fathead Rocker Arm Assembly with Low Ratio Stands and Tool Steel 1.8 BP INT \u0026amp; 1.7 BP EXH (with raised exhaust shaft).\u003c\/p\u003e\u003cp\u003eIntake Ratio: 1.8 Exhaust Ratio: 1.6 Our goal is to deliver valvetrain solutions that excel in performance, reliability, and durability, especially in applications pushing beyond 10,000+ RPM. Addressing critical design challenges, we focused on enhancing: \u003cstrong\u003eRocker Arm Geometry:\u003c\/strong\u003e Precision in rocker arm geometry is crucial at high RPMs. We meticulously corrected and optimized our rocker arm assemblies to ensure optimal engine performance and longevity. \u003cstrong\u003eOil Transfer and Leakage Prevention:\u003c\/strong\u003e Featuring forced oiling via the fourth cam bearing. Our design ensures consistent lubrication to both shafts. Tight tolerances between rocker arm stands and shafts minimize oil spillage and pressure loss. Transitioning from stock to Manton assemblies typically increases oil pressure by 10 to 15 pounds without the need for restrictor jets. \u003cstrong\u003eStrength, Stability, and Durability:\u003c\/strong\u003e Incorporating load screws at each rocker arm significantly enhances assembly strength. Heavy-duty shafts and precise material selection further reinforce durability. Rigorously tested in race day environments and labs, our assemblies maintain valve train control even at speeds exceeding 11,200+ RPM. Therefore, extending the service life of components like valve springs and roller lifters. \u003cstrong\u003eOur stands are categorized into Low and High ratios based on exhaust rocker arm ratios: Low (1.6 to 1) and High (1.7 to 1), while the intake ratio remains consistently high at 1.8.\u003c\/strong\u003e \u003cstrong\u003eDiscover why precision engineering matters with our Fathead Rocker Arm Assembly, crafted for unmatched performance and reliability in demanding racing scenarios.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Manton Rocker Arms","offers":[{"title":"Default Title","offer_id":67809861796039,"sku":"RA 47080BP","price":6232.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/1953\/2743\/files\/RA-47080-BP-3-scaled.webp?v=1790952193"},{"product_id":"gen3-kit-f","title":"Gen 3 Hemi - Rocker Arm System ( Non Adjustable )","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManton Gen 3 Hemi Rocker Arm System ( Non Adjustable )\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOver the past decade, enthusiasts are continually pushing the boundaries of the Gen III Hemi engine family. At Manton, we prioritize enhancing valvetrain stability through significant improvements in our rocker arm system. Drawing on decades of Manton family Hemi valvetrain engineering, honed in top-tier racing like Top Fuel, Blown Alcohol, Pro Mod, and Pro Stock, we craft an ultimate bolt-on upgrade. Our system is meticulously designed to seamlessly integrate with OEM cylinder heads, accommodating a wide spectrum of applications—from daily-driven hot rods to high-performance 2,500+ HP Tube Chassis Race Cars. Engineered for resilience, our .250 wall chromoly rocker arm shafts bolster system rigidity. To further enhancing valvetrain durability. We've engineered special pushrod tips to accommodate our robust 3\/8 diameter pushrods, offering over double the strength of standard OEM 5\/16 diameter pushrods. This system is engineered to deliver the strength and reliability needed to boost the power of your Gen III Hemi engine with confidence.\u003c\/p\u003e\u003cp\u003eThis comprehensive kit includes:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e8 Manton Tool Steel Exhaust Rocker Arms (RA GEN 3-I)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e8 Manton Tool Steel Exhaust Rocker Arms (RA GEN 3-E)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e4 Nitrided 4130 Chromoly Steel .250 Wall Rocker Shafts (\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"editor-link\" href=\"https:\/\/mantonpushrods.com\/product\/gen-3-hemi-rocker-arm-shaft\/\"\u003eRA 3070\u003c\/a\u003e)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e10 Billet Shaft Straps (\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"editor-link\" href=\"https:\/\/mantonpushrods.com\/product\/gen-3-hemi-shaft-straps-apache\/\"\u003eRA 2361-10-A\u003c\/a\u003e)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e16 Billet Shaft Collars (\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"editor-link\" href=\"https:\/\/mantonpushrods.com\/product\/gen-3-hemi-shaft-collar\/\"\u003eRA 2351\u003c\/a\u003e)\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Manton Rocker Arms","offers":[{"title":"Default Title","offer_id":67809862942919,"sku":"GEN3-KIT-F","price":4365.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/1953\/2743\/files\/Gen3-Kit-F-1-scaled.webp?v=1790952204"},{"product_id":"ra-45080bp","title":"Manton's Fathead Hemi - High Ratio Rocker Arm System","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManton Fathead Hemi High Ratio Rocker Arm System\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e Explore our Fathead Rocker Arm Assembly with High Ratio Stands and Tool Steel Construction. \u003cstrong\u003eIncludes:\u003c\/strong\u003e Complete Rocker Arm Assembly with Adjusting Screws and Jam Nuts\u003c\/p\u003e\u003cp\u003eSpecs:\u003c\/p\u003e\u003cp\u003e Intake Ratio: 1.8 Exhaust Ratio: 1.7 At Manton, our mission is to deliver valvetrain solutions that redefine performance, reliability, and durability in high-speed engine applications exceeding 10,000 RPM. Addressing key challenges, we've perfected our rocker arm assemblies with: \u003cstrong\u003eRocker Arm Geometry:\u003c\/strong\u003e Precision is paramount, especially at high RPMs. Our designs adhere to fundamental geometric principles, ensuring optimal performance under extreme conditions like manifold boost and cylinder pressure. \u003cstrong\u003eOil Transfer and Leak Prevention:\u003c\/strong\u003e Utilizing forced oiling via the fourth cam bearing, our assemblies deliver continuous lubrication to both shafts through radial transfer passages. This minimizes oil spillage and pressure loss, enhancing overall efficiency and reliability. \u003cstrong\u003eStrength, Stability, and Durability:\u003c\/strong\u003e Reinforced with load screws at each rocker arm, our assemblies boast doubled strength. Heavy-duty rocker arm shafts and meticulously chosen materials ensure resilience and longevity. Heat treatment further enhances their durability, supporting consistent valve train control even at the highest RPMs. With over a decade of rigorous testing, including race day simulations and extensive lab trials, our assemblies prove stable beyond 11,200+ RPM. They significantly extend the service life of valve springs, roller lifters, and all valvetrain components, delivering unmatched performance in demanding environments. \u003cstrong\u003eEmbrace precision engineering with our Fathead Rocker Arm Assembly, designed for uncompromising performance and durability in competitive racing and high-performance applications.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Manton Rocker Arms","offers":[{"title":"Default Title","offer_id":67809867890887,"sku":"RA 45080BP","price":6232.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/1953\/2743\/files\/1781728717312-680001281.jpg?v=1790952237"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/1953\/2743\/collections\/Mopar-Hemi_Rocker_Arm_System.jpg?v=1789760532","url":"https:\/\/mantonpushrods.com\/collections\/gas-products-mopar-manton-mopar-hemi-rocker-arm-system.oembed","provider":"Manton Racing Products","version":"1.0","type":"link"}