{"product_id":"katech-extreme-duty-h13-tool-steel-valve-spring-replacement-retainer","title":"Katech Extreme Duty H13 Tool Steel Valve Spring Replacement Retainer","description":"\u003ch2\u003eKatech Extreme Duty H13 Tool Steel Valve Spring Replacement Retainer\u003c\/h2\u003e \u003cp\u003e\u003cstrong\u003e\u003cem\u003eHardened Tool Steel Wear Resistance for Demanding Valvetrain Applications.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eThe Katech Extreme Duty H13 Tool Steel Valve Spring Replacement Retainer is designed for PSI-LS1511 and PSI-LS1516 valve springs. It provides increased long-term wear resistance compared with titanium retainers in evaluated Katech camshaft packages, addressing wear where steel springs contact the retainer.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eHardened H13 Tool Steel Construction\u003c\/li\u003e \u003cli\u003eIncreased Spring-Contact Wear Resistance in Evaluated Katech Packages\u003c\/li\u003e \u003cli\u003eDeveloped for Demanding Racing Conditions\u003c\/li\u003e \u003cli\u003eAvailable Individually for Valvetrain Service\u003c\/li\u003e \u003cli\u003eProudly Engineered and Manufactured by Katech Engineering in Clinton Township, Michigan, 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 Replacement Valve Spring Retainer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Hardened H13 Tool Steel\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatible Valve Springs:\u003c\/strong\u003e PSI-LS1511 and PSI-LS1516\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eWhat's Included\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eOne Replacement Retainer — Sold Individually\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eValve springs and valve locks are not included.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eRetainer Weight Comparison\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eReferenced OEM Retainer:\u003c\/strong\u003e 11.4 Grams\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReferenced Katech Titanium Retainer:\u003c\/strong\u003e 5.0 Grams\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eKatech H13 Tool Steel Retainer:\u003c\/strong\u003e 9.1 Grams\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSelect retainer material based on both weight and the wear requirements of the complete valvetrain.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eDevelopment \u0026amp; Validation\u003c\/h3\u003e \u003cp\u003eKatech developed the design on its Spintron valvetrain dynamics test cell. Stability was validated up to 8,100 RPM in tested combinations, and durability was evaluated using Katech's 24 Hours of Daytona course simulation.\u003c\/p\u003e \u003cp\u003eThese results apply to the evaluated packages. The appropriate engine operating range depends on the complete camshaft, valve, spring, lifter, pushrod, and rocker combination.\u003c\/p\u003e \u003chr\u003e \u003ch3\u003eFitment \u0026amp; Installation Notes\u003c\/h3\u003e \u003cp\u003eConfirm that the replacement matches the existing valvetrain package, including valve stem dimensions and valve lock compatibility.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eInspect Springs and Locks for Wear or Damage\u003c\/li\u003e \u003cli\u003eCheck Spring Installed Height and Spring Pressures\u003c\/li\u003e \u003cli\u003eVerify Coil Bind Clearance at Maximum Valve Lift\u003c\/li\u003e \u003cli\u003eCheck Retainer-to-Seal and Retainer-to-Guide Clearance\u003c\/li\u003e \u003cli\u003eFollow Appropriate Valvetrain Inspection and Service Intervals\u003c\/li\u003e \u003c\/ul\u003e \u003chr\u003e \u003ch3\u003eWhy Choose Katech\u003c\/h3\u003e \u003cp\u003eKatech combines component engineering and manufacturing with in-house valvetrain testing. That process evaluates how the retainer performs within a matched engine package and supports informed component selection for demanding applications.\u003c\/p\u003e \u003chr\u003e \u003cp\u003eFor replacement selection and valvetrain 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":47875070886044,"sku":"KAT-7128","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0473\/3206\/5436\/files\/M198642371.jpg?v=1791938572","url":"https:\/\/daroracing.com\/products\/katech-extreme-duty-h13-tool-steel-valve-spring-replacement-retainer","provider":"Daro Racing","version":"1.0","type":"link"}