{"product_id":"bc0300shd-toyota-2jz-1jz-heavy-duty-single-spring-steel-retainer-kit","title":"BC0300SHD - Toyota 2JZ\/1JZ Heavy-Duty Single Spring\/Steel Retainer Kit","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a00b95c-a878-8390-b417-68518f2031d8-1\" data-is-intersecting=\"true\"\u003e\n\u003cdiv class=\"relative w-full overflow-visible\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a00b95c-a878-8390-b417-68518f2031d8-1\" data-turn-id-container=\"request-6a00b95c-a878-8390-b417-68518f2031d8-1\" data-testid=\"conversation-turn-76\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"66cba5d0-4862-4acf-979c-54ded7e411ba\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003ch1 data-section-id=\"euor6a\" data-start=\"0\" data-end=\"94\"\u003eBrian Crower Heavy-Duty Valve Spring and Steel Retainer Kit for Toyota 1JZ \/ 2JZ (BC0300SHD)\u003c\/h1\u003e\n\u003cp data-start=\"96\" data-end=\"479\"\u003eWhen building a high-horsepower JZ engine, valvetrain stability becomes critical to maintaining reliable performance at elevated RPM and boost levels. The Brian Crower Heavy-Duty Single Valve Spring and Steel Retainer Kit is engineered to provide the increased spring pressure and precise valve control required for aggressive camshaft profiles and demanding motorsport applications.\u003c\/p\u003e\n\u003cp data-start=\"481\" data-end=\"926\"\u003eRated for applications exceeding 800 wheel horsepower, this kit features PAC Racing valve springs manufactured from premium super-clean chrome silicone alloy using proprietary processing techniques to ensure consistent spring pressures and long-term durability. Paired with high-strength steel retainers, the kit delivers exceptional valvetrain control and durability while offering a robust and cost-effective alternative to titanium retainers.\u003c\/p\u003e\n\u003cp data-start=\"928\" data-end=\"1161\"\u003eWhether you're assembling a high-revving 1JZ-GTE, upgrading a fully built 2JZ-GTE, or preparing a serious street, drift, drag, or circuit engine, this kit provides the reliability and performance required to support your build goals.\u003c\/p\u003e\n\u003cp data-start=\"1163\" data-end=\"1358\"\u003eTrusted by professional engine builders and motorsport teams worldwide, Brian Crower valvetrain components are a proven upgrade for unlocking the full potential of Toyota’s legendary JZ platform.\u003c\/p\u003e\n\u003cp data-start=\"1360\" data-end=\"1441\"\u003eCarefully selected for builders who demand proven performance without compromise.\u003c\/p\u003e\n\u003chr data-start=\"1443\" data-end=\"1446\"\u003e\n\u003ch2 data-section-id=\"f8iud9\" data-start=\"1448\" data-end=\"1496\"\u003eWhy Upgrade Your Valve Springs and Retainers?\u003c\/h2\u003e\n\u003cp data-start=\"1498\" data-end=\"1540\"\u003eCompared to factory valvetrain components:\u003c\/p\u003e\n\u003cp data-start=\"1542\" data-end=\"1829\"\u003e✔ Increased spring pressure for superior valve control at high RPM\u003cbr data-start=\"1608\" data-end=\"1611\"\u003e✔ Rated for applications exceeding 800 WHP\u003cbr data-start=\"1653\" data-end=\"1656\"\u003e✔ Prevents valve float with aggressive camshaft profiles\u003cbr data-start=\"1712\" data-end=\"1715\"\u003e✔ High-strength steel retainers for exceptional durability\u003cbr data-start=\"1773\" data-end=\"1776\"\u003e✔ Trusted by professional engine builders worldwide\u003c\/p\u003e\n\u003chr data-start=\"1831\" data-end=\"1834\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"1836\" data-end=\"1851\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"1853\" data-end=\"2187\"\u003e✔ Genuine Brian Crower heavy-duty single valve spring kit\u003cbr data-start=\"1910\" data-end=\"1913\"\u003e✔ PAC Racing springs manufactured from premium chrome silicone alloy\u003cbr data-start=\"1981\" data-end=\"1984\"\u003e✔ High-strength steel retainers included (BC2300S-24)\u003cbr data-start=\"2037\" data-end=\"2040\"\u003e✔ Designed for high-RPM and high-boost applications\u003cbr data-start=\"2091\" data-end=\"2094\"\u003e✔ Compatible with OEM spring seats\u003cbr data-start=\"2128\" data-end=\"2131\"\u003e✔ Suitable for street, drag, drift, and circuit builds\u003c\/p\u003e\n\u003chr data-start=\"2189\" data-end=\"2192\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"2194\" data-end=\"2221\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"2223\" data-end=\"2715\"\u003e✔ Brand: Brian Crower\u003cbr data-start=\"2244\" data-end=\"2247\"\u003e✔ Part Number: BC0300SHD\u003cbr data-start=\"2271\" data-end=\"2274\"\u003e✔ Spring Type: BC1300 Heavy-Duty Single Spring\u003cbr data-start=\"2320\" data-end=\"2323\"\u003e✔ Free Length: 1.690\"\u003cbr data-start=\"2344\" data-end=\"2347\"\u003e✔ Seat Pressure: 102 lbs @ 1.320\"\u003cbr data-start=\"2380\" data-end=\"2383\"\u003e✔ Open Pressure: 215 lbs @ 0.900\"\u003cbr data-start=\"2416\" data-end=\"2419\"\u003e✔ Coil Bind Height: 0.835\"\u003cbr data-start=\"2445\" data-end=\"2448\"\u003e✔ Retainers Included: BC2300S-24 Steel Retainers\u003cbr data-start=\"2496\" data-end=\"2499\"\u003e✔ Spring Seat: OEM\u003cbr data-start=\"2517\" data-end=\"2520\"\u003e✔ Maximum Net Cam Lift: 0.460\" \/ 11.68 mm\u003cbr data-start=\"2561\" data-end=\"2564\"\u003e✔ Power Rating: 800+ WHP\u003cbr data-start=\"2588\" data-end=\"2591\"\u003e✔ Material: Chrome Silicone Alloy\u003cbr data-start=\"2624\" data-end=\"2627\"\u003e✔ Application: High-Performance Valvetrain Upgrade\u003cbr data-start=\"2677\" data-end=\"2680\"\u003e✔ Engine Family: Toyota JZ-Series\u003c\/p\u003e\n\u003chr data-start=\"2717\" data-end=\"2720\"\u003e\n\u003ch2 data-section-id=\"15vxm9q\" data-start=\"2722\" data-end=\"2743\"\u003eCompatible Engines\u003c\/h2\u003e\n\u003cp data-start=\"2745\" data-end=\"2790\"\u003e✔ 1JZ-GE\u003cbr data-start=\"2753\" data-end=\"2756\"\u003e✔ 1JZ-GTE\u003cbr data-start=\"2765\" data-end=\"2768\"\u003e✔ 2JZ-GE\u003cbr data-start=\"2776\" data-end=\"2779\"\u003e✔ 2JZ-GTE\u003c\/p\u003e\n\u003chr data-start=\"2792\" data-end=\"2795\"\u003e\n\u003ch2 data-section-id=\"icfs9j\" data-start=\"2797\" data-end=\"2808\"\u003eShipping\u003c\/h2\u003e\n\u003cp data-start=\"2810\" data-end=\"2894\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e🇪🇺 EU Delivery: 5–10 Business Days\u003cbr data-start=\"2846\" data-end=\"2849\"\u003e🌍 International Delivery: 7–21 Business Days\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cdiv class=\"contents\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Brian Crower","offers":[{"title":"Default Title","offer_id":57666100003164,"sku":null,"price":201.47,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1019\/6300\/6300\/files\/ChatGPTImageMay17_2026_10_28_58AM.png?v=1779002951","url":"https:\/\/jzsignature.com\/products\/bc0300shd-toyota-2jz-1jz-heavy-duty-single-spring-steel-retainer-kit","provider":"JZ Signature","version":"1.0","type":"link"}