{"product_id":"pac-ls-valve-springs-550-lift-set-of-16-high-performance-upgrade-pac-2568-replaces-gm-12713265-ls1-ls2-ls3-4-8-5-3-6-0-6-2","title":"PAC LS Valve Springs .550 Lift (Set of 16) PAC-2568 | 1997–2017 4.8 5.3 6.0 6.2 LS1 LS3","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; }\n\n.pd-grid {\n  display: grid;\n  grid-template-columns: 1fr 1fr;\n  gap: 16px;\n  margin-bottom: 16px;\n}\n\n@media (max-width: 640px) {\n  .pd-grid { grid-template-columns: 1fr; }\n  .pd-title { font-size: 36px; }\n}\n\n.pd-box {\n  background: #16191F;\n  border: 1px solid rgba(255,255,255,.09);\n  border-radius: 16px;\n  padding: 28px;\n}\n\n.pd-box h4 {\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  margin-bottom: 18px;\n  display: flex;\n  align-items: center;\n  gap: 10px;\n}\n\n.pd-box h4::before {\n  content: '';\n  display: block;\n  width: 4px;\n  height: 20px;\n  background: #FF5A00;\n  border-radius: 2px;\n  flex-shrink: 0;\n}\n\n.pd-list {\n  list-style: none;\n  display: flex;\n  flex-direction: column;\n  gap: 12px;\n}\n\n.pd-list li {\n  font-size: 16px;\n  color: #8B94A3;\n  padding-left: 0;\n  position: relative;\n  line-height: 1.6;\n}\n\n.pd-list li::before {\n  content: none;\n}\n\n.pd-list li strong { color: #E8EDF2; }\n\n.pd-variants {\n  display: grid;\n  grid-template-columns: 1fr 1fr;\n  gap: 14px;\n  margin-bottom: 16px;\n}\n\n@media (max-width: 640px) {\n  .pd-variants { grid-template-columns: 1fr; }\n}\n\n.pd-variant {\n  background: #16191F;\n  border: 1px solid rgba(255,255,255,.09);\n  border-radius: 16px;\n  padding: 22px 24px;\n  display: flex;\n  gap: 16px;\n  align-items: flex-start;\n  transition: border-color .2s;\n}\n\n.pd-variant:hover { border-color: rgba(255,90,0,.35); }\n\n.pd-variant-icon {\n  width: 48px;\n  height: 48px;\n  border-radius: 12px;\n  background: rgba(255,90,0,.12);\n  border: 1px solid rgba(255,90,0,.22);\n  display: flex;\n  align-items: center;\n  justify-content: center;\n  font-size: 24px;\n  flex-shrink: 0;\n}\n\n.pd-variant b {\n  display: block;\n  font-size: 17px;\n  font-weight: 700;\n  color: #fff;\n  margin-bottom: 6px;\n}\n\n.pd-variant span {\n  font-size: 15px;\n  color: #8B94A3;\n  line-height: 1.55;\n}\n\n.pd-warning {\n  background: rgba(255,90,0,.07);\n  border: 1px solid rgba(255,90,0,.22);\n  border-left: 4px solid #FF5A00;\n  border-radius: 16px;\n  padding: 24px 28px;\n  margin-bottom: 16px;\n}\n\n.pd-warning h4 {\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: #FF5A00;\n  margin-bottom: 14px;\n}\n\n.pd-warning p {\n  font-size: 16px;\n  color: #8B94A3;\n  line-height: 1.65;\n  margin-bottom: 14px;\n}\n\n.pd-warning p:last-child { margin-bottom: 0; }\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\"\u003ePAC Racing Valvetrain Components\u003c\/div\u003e\n\u003ch2 class=\"pd-title\"\u003eLS Valve Springs .550\" Lift\u003c\/h2\u003e\n\u003cp class=\"pd-lead\"\u003eUpgrade your LS engine's valve springs with this \u003cstrong\u003ecomplete set of 16 PAC Racing valve springs\u003c\/strong\u003e, rated for camshafts with up to \u003cstrong\u003e.550\" of lift\u003c\/strong\u003e. Part number \u003cstrong\u003ePAC-2568\u003c\/strong\u003e is a direct drop-in replacement for stock GM springs and is a go-to choice for \u003cstrong\u003estreet performance cam swaps\u003c\/strong\u003e including Chopacabra and similar stage 1-2 camshaft builds.\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\u003eDirect Drop-In Upgrade\u003c\/b\u003e \u003cspan\u003eA popular spring upgrade for LS street builds needing more lift capacity than stock without jumping to an extreme-duty setup.\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\u003eCam Swap Ready\u003c\/b\u003e \u003cspan\u003eIdeal for common stage 1-2 LS camshaft upgrades where factory springs are no longer enough for safe high-RPM operation.\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\u003ePAC Racing:\u003c\/strong\u003e PAC-2568\u003c\/li\u003e\n\u003cli\u003eReplaces \u003cstrong\u003eGM 12713265\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003eQuantity Included\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003eSet of \u003cstrong\u003e16 valve springs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eComplete set for \u003cstrong\u003eone V8 engine\u003c\/strong\u003e both cylinder heads\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\u003eEngine Compatibility\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003eFits \u003cstrong\u003eGM Gen III and Gen IV LS-based V8 engines\u003c\/strong\u003e with up to \u003cstrong\u003e.550\" camshaft lift\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.8L\u003c\/strong\u003e LR4, LM4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.3L\u003c\/strong\u003e LM7, L59, LH6, LC9, LMG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.7L\u003c\/strong\u003e LS1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.0L\u003c\/strong\u003e LQ4, LQ9, LY6, L96\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.2L\u003c\/strong\u003e LS3, L92, L9H, L94\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003eCommon Engine Codes\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003e\u003cstrong\u003eLS1, LS2, LS3, LS6\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLR4, LM4, LM7, L59, LH6, LC9, LMG\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLQ4, LQ9, LY6, L96\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eL92, L9H, L94\u003c\/strong\u003e\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\u003eVehicle Fitment\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e1997-2013 Chevrolet\/GMC Silverado \u0026amp; Sierra\u003c\/strong\u003e 1500, 2500, 3500\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1997-2013 Chevrolet Tahoe, Suburban \/ GMC Yukon, Yukon XL\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1997-2013 Chevrolet Avalanche\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1997-2002 Chevrolet Camaro \/ Pontiac Firebird\u003c\/strong\u003e LS1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2004-2006 Pontiac GTO\u003c\/strong\u003e LS1, LS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2005-2013 Chevrolet Corvette\u003c\/strong\u003e LS2, LS3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2010-2015 Chevrolet Camaro SS\u003c\/strong\u003e LS3\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCustom LS swap applications\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-box\"\u003e\n\u003ch4\u003ePerformance Benefits\u003c\/h4\u003e\n\u003cul class=\"pd-list\"\u003e\n\u003cli\u003eRequired when installing a \u003cstrong\u003eperformance camshaft\u003c\/strong\u003e that exceeds stock lift\u003c\/li\u003e\n\u003cli\u003eHelps prevent \u003cstrong\u003evalve float\u003c\/strong\u003e at higher RPM\u003c\/li\u003e\n\u003cli\u003eHelps avoid \u003cstrong\u003ecoil bind\u003c\/strong\u003e and retainer-to-seal contact\u003c\/li\u003e\n\u003cli\u003eExcellent match for \u003cstrong\u003estreet performance cam swaps\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-warning\"\u003e\n\u003ch4\u003eImportant Fitment Notes\u003c\/h4\u003e\n\u003cp\u003eAnytime you install a \u003cstrong\u003eperformance camshaft exceeding stock lift specifications\u003c\/strong\u003e, upgraded valve springs are required for safe and reliable operation.\u003c\/p\u003e\n\u003cul style=\"margin-bottom: 10px;\" class=\"pd-list\"\u003e\n\u003cli\u003eDesigned for camshafts with up to \u003cstrong\u003e.550\" lift\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCommon choice for \u003cstrong\u003eChopacabra and similar stage 1-2 camshafts\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHelps prevent \u003cstrong\u003evalve float, coil bind, and retainer-to-seal contact\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eVerify your complete \u003cstrong\u003evalvetrain combination\u003c\/strong\u003e before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdetails class=\"pd-details\"\u003e\n\u003csummary class=\"pd-summary\"\u003e\u003cspan\u003eInstallation Notes\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\u003eIdeal for street performance cam swaps\u003c\/li\u003e\n\u003cli\u003eWorks well in stage 1-2 LS camshaft combinations\u003c\/li\u003e\n\u003cli\u003eBest results when paired with proper supporting valvetrain components\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\u003eThese PAC springs are a \u003cstrong\u003epopular high-performance upgrade\u003c\/strong\u003e for LS cam swaps needing support up to \u003cstrong\u003e.550\" lift\u003c\/strong\u003e while maintaining strong street reliability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Texas Speed","offers":[{"title":"Default Title","offer_id":43096822087747,"sku":"PAC-2568-16","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/1964\/7811\/files\/PACHighPerformanceLS.550.webp?v=1774917071","url":"https:\/\/jrjonesracing.com\/products\/pac-ls-valve-springs-550-lift-set-of-16-high-performance-upgrade-pac-2568-replaces-gm-12713265-ls1-ls2-ls3-4-8-5-3-6-0-6-2","provider":"J.R. Jones Racing","version":"1.0","type":"link"}