{"product_id":"katech-gen-v-lt4-lt5-semi-premium-cnc-ported-cylinder-heads","title":"Katech Gen V LT4\/LT5 Semi-Premium CNC Ported Assembled Cylinder Heads","description":"\u003ch2\u003eKatech Gen V LT4\/LT5 Semi-Premium CNC Ported Assembled Cylinder Heads\u003c\/h2\u003e \u003cp\u003e\u003cstrong\u003e\u003cem\u003eNEW GM CASTINGS · CNC PORTED · COMPETITION VALVE JOB · HAND BLENDED · .660-INCH DUAL SPRINGS\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eThe \u003cstrong\u003eKatech Gen V LT4\/LT5 Semi-Premium CNC Ported Assembled Cylinder Heads\u003c\/strong\u003e provide a complete performance cylinder head package for compatible LT4 and LT5 applications using 7.5mm direct injection injectors. Each pair starts with brand-new GM cylinder head castings and receives Katech CNC porting, a multi-angle competition valve job, and hand blending before final assembly.\u003c\/p\u003e \u003cp\u003eThese heads feature new GM titanium intake valves, stock GM exhaust valves, stock GM valve guides, and a .660-inch dual valve spring package with titanium retainers. They are fully assembled, engraved with the Katech logo, and sold as a complete pair with no core exchange required.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eBrand-New GM Cylinder Head Castings\u003c\/li\u003e \u003cli\u003eKatech CNC Ported Intake and Exhaust Ports\u003c\/li\u003e \u003cli\u003eMulti-Angle Competition Valve Job\u003c\/li\u003e \u003cli\u003eHand Blended\u003c\/li\u003e \u003cli\u003eNew GM Titanium Intake Valves\u003c\/li\u003e \u003cli\u003eStock GM Exhaust Valves\u003c\/li\u003e \u003cli\u003eStock GM Valve Guides\u003c\/li\u003e \u003cli\u003e.660-Inch Dual Valve Spring Package\u003c\/li\u003e \u003cli\u003eTitanium Valve Spring Retainers\u003c\/li\u003e \u003cli\u003eDesigned for Compatible LT4\/LT5 Applications Using 7.5mm Direct Injection Injectors\u003c\/li\u003e \u003cli\u003eKatech Logo Engraved on Each Cylinder Head\u003c\/li\u003e \u003cli\u003eFully Assembled and Ready to Bolt On\u003c\/li\u003e \u003cli\u003eNo Core Exchange Required\u003c\/li\u003e \u003cli\u003eSold as a Complete Pair\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThese cylinder heads are \u003cstrong\u003eProudly CNC Ported, Competition Valve Job Machined, Hand Blended, Engraved, and Hand Assembled by Katech Engineering in Clinton Township, Michigan, USA.\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"..\/files\/images\/katech-made-in-america.png\" alt=\"Proudly Made in America\" width=\"300\"\u003e\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eEngine Family:\u003c\/strong\u003e GM Gen V LT4 \/ LT5\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCylinder Head Castings:\u003c\/strong\u003e New GM Castings\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePorting:\u003c\/strong\u003e Katech CNC Ported Intake and Exhaust Ports\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eValve Job:\u003c\/strong\u003e Multi-Angle Competition Valve Job\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFinishing:\u003c\/strong\u003e Hand Blended\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntake Port Volume:\u003c\/strong\u003e 313.4cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExhaust Port Volume:\u003c\/strong\u003e 113cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eKatech Chamber Volume:\u003c\/strong\u003e 68cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntake Valves:\u003c\/strong\u003e New GM Titanium\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExhaust Valves:\u003c\/strong\u003e Stock GM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eValve Guides:\u003c\/strong\u003e Stock GM\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eValve Springs:\u003c\/strong\u003e .660-Inch Dual Valve Spring Package\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eValve Spring Retainers:\u003c\/strong\u003e Titanium\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDirect Injection Injector Size:\u003c\/strong\u003e 7.5mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAssembly:\u003c\/strong\u003e Fully Assembled\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCore Required:\u003c\/strong\u003e No\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Pair\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eKatech Semi-Premium CNC Porting \u0026amp; Airflow\u003c\/h3\u003e \u003cp\u003eThese Semi-Premium cylinder heads receive Katech CNC porting, a multi-angle competition valve job, and hand blending. The airflow data below represents the \u003cstrong\u003eKatech CNC + Valve Job + Blending\u003c\/strong\u003e configuration and compares it with a production OEM LT4 cylinder head.\u003c\/p\u003e \u003ctable border=\"1\" cellpadding=\"6\"\u003e \u003cthead\u003e \u003ctr\u003e \u003cth\u003eValve Lift\u003c\/th\u003e \u003cth\u003eKatech Semi-Premium Intake\u003c\/th\u003e \u003cth\u003eOEM LT4 Intake\u003c\/th\u003e \u003cth\u003eKatech Semi-Premium Exhaust\u003c\/th\u003e \u003cth\u003eOEM LT4 Exhaust\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e.100\"\u003c\/td\u003e \u003ctd\u003e68 CFM\u003c\/td\u003e \u003ctd\u003e70 CFM\u003c\/td\u003e \u003ctd\u003e54 CFM\u003c\/td\u003e \u003ctd\u003e54 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e.200\"\u003c\/td\u003e \u003ctd\u003e139 CFM\u003c\/td\u003e \u003ctd\u003e141 CFM\u003c\/td\u003e \u003ctd\u003e113 CFM\u003c\/td\u003e \u003ctd\u003e123 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e.300\"\u003c\/td\u003e \u003ctd\u003e224 CFM\u003c\/td\u003e \u003ctd\u003e213 CFM\u003c\/td\u003e \u003ctd\u003e161 CFM\u003c\/td\u003e \u003ctd\u003e152 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e.400\"\u003c\/td\u003e \u003ctd\u003e281 CFM\u003c\/td\u003e \u003ctd\u003e264 CFM\u003c\/td\u003e \u003ctd\u003e202 CFM\u003c\/td\u003e \u003ctd\u003e176 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e.500\"\u003c\/td\u003e \u003ctd\u003e307 CFM\u003c\/td\u003e \u003ctd\u003e277 CFM\u003c\/td\u003e \u003ctd\u003e217 CFM\u003c\/td\u003e \u003ctd\u003e193 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e.600\"\u003c\/td\u003e \u003ctd\u003e327 CFM\u003c\/td\u003e \u003ctd\u003e283 CFM\u003c\/td\u003e \u003ctd\u003e224 CFM\u003c\/td\u003e \u003ctd\u003e200 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e.700\"\u003c\/td\u003e \u003ctd\u003e347 CFM\u003c\/td\u003e \u003ctd\u003e298 CFM\u003c\/td\u003e \u003ctd\u003e227 CFM\u003c\/td\u003e \u003ctd\u003e204 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e.800\"\u003c\/td\u003e \u003ctd\u003e355 CFM\u003c\/td\u003e \u003ctd\u003e309 CFM\u003c\/td\u003e \u003ctd\u003e230 CFM\u003c\/td\u003e \u003ctd\u003e206 CFM\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cstrong\u003ePort \u0026amp; Chamber Data\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eKatech Intake Port Volume:\u003c\/strong\u003e 313.4cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM LT4 Intake Port Volume:\u003c\/strong\u003e 295cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eKatech Exhaust Port Volume:\u003c\/strong\u003e 113cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM LT4 Exhaust Port Volume:\u003c\/strong\u003e 109.8cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eKatech Chamber Volume:\u003c\/strong\u003e 68cc\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM LT4 Chamber Volume:\u003c\/strong\u003e 65.2cc\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Airflow figures are flow-bench test data and do not establish maximum allowable camshaft lift. Camshaft and valvetrain compatibility should be determined based on the requirements of the complete engine combination.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eVehicle \u0026amp; Engine Fitment\u003c\/h3\u003e \u003cp\u003e\u003cstrong\u003eChevrolet Corvette\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e2015–2019 Chevrolet Corvette C7 Z06 – LT4 6.2L Supercharged\u003c\/li\u003e \u003cli\u003e2019 Chevrolet Corvette C7 ZR1 – LT5 6.2L Supercharged\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eChevrolet Camaro\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e2017–2024 Chevrolet Camaro ZL1 – LT4 6.2L Supercharged\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eCadillac\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e2016–2019 Cadillac CTS-V – LT4 6.2L Supercharged\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eImportant Fitment Note:\u003c\/strong\u003e These cylinder heads are designed for compatible LT4\/LT5 applications using 7.5mm direct injection injectors. Verify engine and injector configuration before ordering.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eSemi-Premium vs. Premium\u003c\/h3\u003e \u003cp\u003eThe primary difference between Katech Semi-Premium and Premium LT4\/LT5 cylinder heads is the valve guide configuration. The Semi-Premium heads retain the \u003cstrong\u003estock GM valve guides\u003c\/strong\u003e, while the Premium configuration receives \u003cstrong\u003eKatech Manganese Bronze Valve Guides\u003c\/strong\u003e.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eWhat's Included\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e(2) New GM LT4\/LT5 Cylinder Head Castings, CNC Ported by Katech\u003c\/li\u003e \u003cli\u003eNew GM Titanium Intake Valves\u003c\/li\u003e \u003cli\u003eStock GM Exhaust Valves\u003c\/li\u003e \u003cli\u003eStock GM Valve Guides\u003c\/li\u003e \u003cli\u003e.660-Inch Dual Valve Spring Package\u003c\/li\u003e \u003cli\u003eTitanium Valve Spring Retainers\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eCylinder heads receive a multi-angle competition valve job and hand blending before being engraved and hand assembled at Katech Engineering. They are supplied fully assembled as a complete pair.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eWhy Choose Katech?\u003c\/h3\u003e \u003cp\u003eSince 1977, Katech has developed high-performance engines and components for professional motorsports, OEM development programs, and performance applications. Katech's Gen V LT cylinder head programs apply that experience to CNC port development, precision machining, valvetrain preparation, and final assembly.\u003c\/p\u003e \u003cp\u003eThe Semi-Premium LT4\/LT5 cylinder heads combine new GM castings with Katech CNC porting, a multi-angle competition valve job, hand blending, .660-inch dual valve springs, and titanium retainers while retaining the stock GM valve guides. Each pair is prepared and assembled at Katech Engineering in Clinton Township, Michigan.\u003c\/p\u003e \u003chr\u003e \u003cp\u003e\u003cimg src=\"..\/files\/prop-65-warning.jpg\" alt=\"California Proposition 65 Warning\" width=\"175\"\u003e\u003c\/p\u003e","brand":"Katech","offers":[{"title":"Default Title","offer_id":47875120267420,"sku":"KAT-A7686","price":5144.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/3206\/5436\/files\/M198643134.png?v=1791938622","url":"https:\/\/daroracing.com\/products\/katech-gen-v-lt4-lt5-semi-premium-cnc-ported-cylinder-heads","provider":"Daro Racing","version":"1.0","type":"link"}