{"product_id":"katech-gen-v-lt4-680-lift-dual-valve-spring-kit-with-tool-steel-retainers","title":"Katech Gen V LT4 .680 Lift Dual Valve Spring Kit with Tool Steel Retainers","description":"\u003ch2\u003eKatech Gen V LT4 .680 Lift Dual Valve Spring Kit with Tool Steel Retainers\u003c\/h2\u003e \u003cp\u003e\u003cstrong\u003e\u003cem\u003ePSI Max Life Dual Springs with H13 Tool Steel Retainers for Compatible LT4 Cylinder Heads.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eThe Katech Gen V LT4 .680 Lift Dual Valve Spring Kit with Tool Steel Retainers combines PSI-1512ML dual valve springs, two retainer configurations, two steel spring locator configurations, and Viton valve seals for compatible LT4 cylinder head assemblies.\u003c\/p\u003e \u003cp\u003eThe hardened H13 retainers provide increased spring-contact wear resistance compared with titanium retainers in evaluated Katech packages. All kit components are made in the USA.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e \u003cul\u003e \u003cli\u003ePSI-1512ML Dual Valve Springs with Max Life Treatment\u003c\/li\u003e \u003cli\u003eHardened H13 Tool Steel Dual Valve Spring Retainers\u003c\/li\u003e \u003cli\u003eIncreased Spring-Contact Wear Resistance Compared with Titanium Retainers in Evaluated Katech Packages\u003c\/li\u003e \u003cli\u003eRetainers Lighter Than the Referenced OEM Components\u003c\/li\u003e \u003cli\u003eSteel Spring Locators\u003c\/li\u003e \u003cli\u003eViton Valve Seals\u003c\/li\u003e \u003cli\u003eAll Kit Components Made in the USA\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cimg src=\"..\/files\/images\/katech-made-in-america.png\" alt=\"Proudly Made in America\" width=\"300\" height=\"64\"\u003e\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Dual Valve Spring Kit\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCylinder Head Application:\u003c\/strong\u003e Compatible GM Gen V LT4 Heads\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpring Model:\u003c\/strong\u003e PSI-1512ML\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eListed Valve Lift:\u003c\/strong\u003e .680 Inch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpring Pressure at 1.800-Inch Height:\u003c\/strong\u003e 130 LBS\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSpring Pressure at 1.150-Inch Height:\u003c\/strong\u003e 395 LBS\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCoil Bind Height:\u003c\/strong\u003e 1.070 Inches\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRetainer Material:\u003c\/strong\u003e Hardened H13 Tool Steel\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLocator Material:\u003c\/strong\u003e Steel\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eValve Seal Material:\u003c\/strong\u003e Viton\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eWhat's Included\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eSixteen PSI-1512ML Dual Valve Springs\u003c\/li\u003e \u003cli\u003eSixteen Katech H13 Tool Steel Dual Valve Spring Retainers — Eight of Each Supplied Configuration\u003c\/li\u003e \u003cli\u003eSixteen Katech Steel Spring Locators — Eight of Each Supplied Configuration\u003c\/li\u003e \u003cli\u003eSixteen Katech Viton Valve Seals\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eValve locks are not included. This kit requires compatible OEM GM valve locks.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eEngine \u0026amp; Cylinder Head Fitment\u003c\/h3\u003e \u003cp\u003eFor compatible GM Gen V LT4 cylinder heads. Confirm valve dimensions, guide configuration, and spring installed height before ordering, particularly with modified or aftermarket heads.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eRetainer Material Selection\u003c\/h3\u003e \u003cp\u003eKatech recommends the appropriate tool steel retainers for street, road racing, and endurance applications. Titanium remains Katech's recommendation for drag racing.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eInstallation \u0026amp; Compatibility Notes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eUse Compatible OEM GM Valve Locks\u003c\/li\u003e \u003cli\u003eInspect Existing Valve Locks for Wear or Damage\u003c\/li\u003e \u003cli\u003eConfirm the Correct Intake and Exhaust Positions for Each Retainer and Locator Configuration\u003c\/li\u003e \u003cli\u003eVerify Spring Locator and Valve Seal Fit\u003c\/li\u003e \u003cli\u003eMeasure Installed Height at Each Valve\u003c\/li\u003e \u003cli\u003eCheck Spring Pressures Against the Camshaft Requirements\u003c\/li\u003e \u003cli\u003eVerify Coil Bind Clearance at Actual Maximum Valve Lift\u003c\/li\u003e \u003cli\u003eCheck Retainer-to-Seal and Retainer-to-Guide Clearance\u003c\/li\u003e \u003cli\u003eVerify Piston-to-Valve Clearance for the Completed Engine Combination\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThe .680-inch lift designation does not establish clearance for every installation. Actual usable lift depends on installed height, coil bind clearance, and the complete valvetrain configuration.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eWhy Choose Katech\u003c\/h3\u003e \u003cp\u003eThe Katech Gen V LT4 .680 Lift Dual Valve Spring Kit with Tool Steel Retainers brings the dual springs and supporting hardware together for an LT4-specific assembly. Published spring pressures and coil bind height help builders evaluate the package against their camshaft requirements and measured cylinder head geometry.\u003c\/p\u003e \u003chr\u003e \u003cp\u003eFor LT4 cylinder head, retainer position, and spring package compatibility questions, contact .\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"..\/files\/prop-65-warning.jpg\" alt=\"Prop 65 Warning\"\u003e\u003c\/p\u003e","brand":"Katech","offers":[{"title":"Default Title","offer_id":47875135242396,"sku":"KAT-A7921-TS","price":787.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/3206\/5436\/files\/M198644270.png?v=1792260885","url":"https:\/\/daroracing.com\/products\/katech-gen-v-lt4-680-lift-dual-valve-spring-kit-with-tool-steel-retainers","provider":"Daro Racing","version":"1.0","type":"link"}