{"product_id":"texas-speed-gen-v-660-dual-valve-spring-kit-lt1-l83-l86","title":"Texas Speed Gen V .660 Dual Valve Spring Kit – LT1 L83 L86","description":"\u003cp\u003e\u003clink rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\"\u003e \u003clink href=\"https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@700;900\u0026amp;family=Barlow:wght@400;500;600;700\u0026amp;display=swap\" rel=\"stylesheet\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n#jrj-pd {\n  font-family: 'Barlow', sans-serif;\n  background: #111318;\n  color: #E8EDF2;\n  font-size: 16px;\n  line-height: 1.65;\n  padding: 48px 24px;\n}\n\n#jrj-pd * { box-sizing: border-box; margin: 0; padding: 0; }\n#jrj-pd a { color: #FF5A00; text-decoration: none; }\n#jrj-pd a:hover { text-decoration: underline; }\n\n.pd-wrap {\n  max-width: 960px;\n  margin: 0 auto;\n}\n\n.pd-eyebrow {\n  display: inline-flex;\n  align-items: center;\n  gap: 10px;\n  font-family: 'Barlow Condensed', sans-serif;\n  font-size: 14px;\n  font-weight: 900;\n  letter-spacing: 2.5px;\n  text-transform: uppercase;\n  color: #FF5A00;\n  margin-bottom: 16px;\n}\n\n.pd-eyebrow::before {\n  content: '';\n  display: block;\n  width: 24px;\n  height: 3px;\n  background: #FF5A00;\n  border-radius: 2px;\n}\n\n.pd-title {\n  font-family: 'Barlow Condensed', sans-serif;\n  font-weight: 900;\n  font-size: 48px;\n  text-transform: uppercase;\n  color: #fff;\n  line-height: 1;\n  letter-spacing: -.3px;\n  margin-bottom: 16px;\n}\n\n.pd-lead {\n  font-size: 17px;\n  color: #8B94A3;\n  max-width: 860px;\n  margin-bottom: 32px;\n  line-height: 1.75;\n}\n\n.pd-lead strong { color: #E8EDF2; 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}\n.pd-warning strong { color: #E8EDF2; }\n\n.pd-details {\n  background: #16191F;\n  border: 1px solid rgba(255,255,255,.09);\n  border-radius: 16px;\n  overflow: hidden;\n  margin-bottom: 16px;\n}\n\n.pd-details[open] { border-color: rgba(255,90,0,.3); }\n\n.pd-summary {\n  cursor: pointer;\n  list-style: none;\n  display: flex;\n  align-items: center;\n  justify-content: space-between;\n  gap: 12px;\n  padding: 22px 28px;\n  font-family: 'Barlow Condensed', sans-serif;\n  font-weight: 900;\n  font-size: 20px;\n  text-transform: uppercase;\n  letter-spacing: .5px;\n  color: #fff;\n  user-select: none;\n}\n\n.pd-summary::-webkit-details-marker { display: none; }\n\n.pd-chevron {\n  color: #FF5A00;\n  font-size: 24px;\n  font-weight: 900;\n  transition: transform .2s;\n  flex-shrink: 0;\n}\n\n.pd-details[open] .pd-chevron { transform: rotate(90deg); }\n\n.pd-vehicle-grid {\n  display: grid;\n  grid-template-columns: 1fr 1fr;\n  gap: 10px 32px;\n  padding: 20px 28px 28px;\n  border-top: 1px solid rgba(255,255,255,.09);\n}\n\n@media (max-width: 640px) {\n  .pd-vehicle-grid { grid-template-columns: 1fr; }\n}\n\n.pd-vehicle-grid li {\n  font-size: 15px;\n  color: #8B94A3;\n  list-style: none;\n  padding-left: 0;\n  position: relative;\n  line-height: 1.6;\n}\n\n.pd-vehicle-grid li::before {\n  content: none;\n}\n\n.pd-video-cta {\n  background: #16191F;\n  border: 1px solid rgba(255,255,255,.09);\n  border-radius: 16px;\n  padding: 28px;\n}\n\n.pd-video-cta p {\n  font-size: 16px;\n  color: #8B94A3;\n  line-height: 1.7;\n}\n\n.pd-video-cta strong { color: #fff; font-size: 17px; }\n\u003c\/style\u003e\n\u003cdiv id=\"jrj-pd\"\u003e\n\u003cdiv class=\"pd-wrap\"\u003e\n\u003cdiv class=\"pd-eyebrow\"\u003eTexas Speed Valvetrain\u003c\/div\u003e\n\u003ch2 class=\"pd-title\"\u003eGen V .660\" Dual Valve Spring Kit\u003c\/h2\u003e\n\u003cp class=\"pd-lead\"\u003eThis \u003cstrong\u003eTexas Speed Gen V .660\" dual valve spring kit\u003c\/strong\u003e is designed specifically for \u003cstrong\u003eLT-based engines\u003c\/strong\u003e, featuring \u003cstrong\u003ePAC Racing valve springs, titanium retainers, and PRC integrated seat\/seal technology\u003c\/strong\u003e. Built for durability, stability, and high RPM control, this kit is ideal for camshaft upgrades on \u003cstrong\u003eGen V truck and performance applications\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"pd-variants\"\u003e\n\u003cdiv class=\"pd-variant\"\u003e\n\u003cdiv class=\"pd-variant-icon\"\u003e🏁\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003eHigh-RPM Valve Control\u003c\/b\u003e \u003cspan\u003eDesigned to improve valvetrain stability, support aggressive cam profiles, and reduce valve float at higher RPM.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-variant\"\u003e\n\u003cdiv class=\"pd-variant-icon\"\u003e⚙️\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003ePremium Gen V Kit\u003c\/b\u003e \u003cspan\u003eIncludes PAC Racing springs, titanium retainers, and integrated PRC seat\/seal components for reliable installation.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-grid\"\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003ePart Number\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTexas Speed:\u003c\/strong\u003e TSP-LT1660SpringKit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003eKit Includes\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePAC Racing\u003c\/strong\u003e Gen V dual valve springs\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTitanium retainers\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePRC integrated\u003c\/strong\u003e valve seats and seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-grid\"\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003eProduct Features\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003eDesigned specifically for \u003cstrong\u003eGen V LT engines\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSupports up to \u003cstrong\u003e.660\" valve lift\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePAC Racing spring technology\u003c\/strong\u003e for superior performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNano-peened springs\u003c\/strong\u003e for increased strength and longevity\u003c\/li\u003e\n\u003cli\u003eImproved \u003cstrong\u003evalvetrain stability\u003c\/strong\u003e at higher RPM\u003c\/li\u003e\n\u003cli\u003eCompatible with \u003cstrong\u003efactory-style lifters\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIntegrated \u003cstrong\u003eseat\/seal design\u003c\/strong\u003e helps prevent installation errors\u003c\/li\u003e\n\u003cli\u003eIncludes high-quality \u003cstrong\u003etitanium retainers\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003eEngine Compatibility\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003eFits \u003cstrong\u003eGM Gen V LT-based V8 engines\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLT1:\u003c\/strong\u003e 6.2L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL83:\u003c\/strong\u003e 5.3L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL86:\u003c\/strong\u003e 6.2L\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-grid\"\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstalled Height:\u003c\/strong\u003e 1.900\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed Pressure:\u003c\/strong\u003e 160 lbs @ 1.900\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Pressure:\u003c\/strong\u003e 406 lbs @ .650\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Pressure:\u003c\/strong\u003e 425 lbs @ .700\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Lift:\u003c\/strong\u003e .660\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Bind:\u003c\/strong\u003e 1.09\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003eCommon Applications\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamshaft upgrades\u003c\/strong\u003e including Chopacabra LT cams\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDOD\/AFM delete\u003c\/strong\u003e builds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance street\u003c\/strong\u003e builds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh RPM valvetrain\u003c\/strong\u003e setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 14px;\" class=\"pd-box\"\u003e\n\u003ch4\u003ePerformance Benefits\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003eImproved \u003cstrong\u003evalvetrain control at higher RPM\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSupports \u003cstrong\u003eaggressive camshaft profiles\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncreased \u003cstrong\u003edurability and spring life\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReduced risk of \u003cstrong\u003evalve float\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-warning\"\u003e\n\u003ch4\u003eImportant Fitment Notes\u003c\/h4\u003e\n\u003cp\u003eThis spring kit is designed specifically for \u003cstrong\u003eGen V LT engines\u003c\/strong\u003e and must be matched properly to your camshaft and overall valvetrain setup.\u003c\/p\u003e\n\u003cul style=\"margin-bottom: 10px;\" class=\"pd-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned specifically\u003c\/strong\u003e for Gen V LT engines\u003c\/li\u003e\n\u003cli\u003eRequires proper \u003cstrong\u003ecamshaft matching\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory valve locks are reused\u003c\/strong\u003e and are not included\u003c\/li\u003e\n\u003cli\u003eVerify \u003cstrong\u003einstalled height\u003c\/strong\u003e during installation\u003c\/li\u003e\n\u003cli\u003eCheck \u003cstrong\u003ecoil bind and clearances\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom tuning required\u003c\/strong\u003e after camshaft installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis kit is built to handle aggressive camshaft setups while maintaining durability, stability, and reliable valvetrain control.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdetails class=\"pd-details\"\u003e\n\u003csummary class=\"pd-summary\"\u003e\u003cspan\u003eInstallation \u0026amp; Warranty\u003c\/span\u003e \u003cspan class=\"pd-chevron\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n\u003cul class=\"pd-vehicle-grid\"\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003cli\u003eIntegrated seat and seal design simplifies installation\u003c\/li\u003e\n\u003cli\u003eDesigned for high-performance Gen V LT valvetrain setups\u003c\/li\u003e\n\u003cli\u003eCovered by manufacturer warranty through Texas Speed \u0026amp; Performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003cdiv class=\"pd-video-cta\"\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cbr\u003eThis spring kit is designed to handle \u003cstrong\u003emore aggressive camshaft setups\u003c\/strong\u003e while maintaining durability and reliability. The integrated seat and seal design helps simplify installation and ensures \u003cstrong\u003eproper fitment\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"J.R. Jones Racing","offers":[{"title":"Default Title","offer_id":43120290332739,"sku":"TSP-LT1660SpringKit","price":389.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/1964\/7811\/files\/5440.webp?v=1775498653","url":"https:\/\/jrjonesracing.com\/products\/texas-speed-gen-v-660-dual-valve-spring-kit-lt1-l83-l86","provider":"J.R. Jones Racing","version":"1.0","type":"link"}