{"product_id":"4jj1-stroker-shaft-4-7mm-fusetech","title":"4JJ1 Stroker Shaft - 4.7mm - FuseTech","description":"\u003c!-- ==================== Product: 4JJ1 HP3 Stroker Shaft – +4.7mm (≈81% Stroke Increase) | FuseTech ==================== --\u003e\n\u003cstyle\u003e\n  \/* ===== Chevron CSS ===== *\/\n  .product-description details summary{\n    cursor:pointer;\n    list-style:none;\n    position:relative;\n    padding-left:16px;\n    font-weight:700;\n    margin:8px 0;\n  }\n  .product-description details summary::before{\n    content:\"›\";\n    position:absolute;\n    left:0;\n    top:2px;\n    transition:transform .2s ease;\n    font-size:1.2em;\n    line-height:1;\n  }\n  .product-description details[open] summary::before{transform:rotate(90deg);}\n  .product-description details div{padding:8px 0 6px 18px;}\n\n  \/* ===== Trust Badges ===== *\/\n  .crc-badges{\n    display:flex;\n    flex-wrap:wrap;\n    gap:8px;\n    justify-content:center;\n    margin:14px 0 20px;\n  }\n  .crc-badges span{\n    display:inline-block;\n    padding:6px 14px;\n    font-size:12px;\n    font-weight:700;\n    border-radius:16px;\n    white-space:nowrap;\n  }\n\n  \/* FuseTech badge – GLOWING GREEN *\/\n  .badge-fusetech{\n    background: #00c853;\n    color:#fff !important;\n    box-shadow: 0 0 20px rgba(0, 200, 83, 0.8), 0 0 30px rgba(0, 200, 83, 0.6), 0 0 40px rgba(0, 200, 83, 0.4);\n    font-weight: 900;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n  }\n\n  \/* Other badge colours *\/\n  .badge-blue{background:#2b5da6;color:#fff;}\n  .badge-green{background:#76b82a;color:#111;}\n  .badge-red{background:#00acc1;color:#fff;}\n  .badge-black{background:#111;color:#fff;}\n\u003c\/style\u003e\n\u003cdiv class=\"product-description\"\u003e\n\u003ch1 style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cu\u003e🔩 4JJ1 HP3 Stroker Shaft – +4.7mm (≈81% Stroke Increase)\u003c\/u\u003e\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2 style=\"text-align: center; margin: 0 0 10px;\"\u003eSerious Pump Capacity for Serious 4JJ1 Builds | FuseTech\u003c\/h2\u003e\n\u003c!-- ===== TRUST BADGES ===== --\u003e\n\u003cdiv class=\"crc-badges\"\u003e\n\u003cspan class=\"badge-fusetech\"\u003e⚡ FuseTech Performance\u003c\/span\u003e \u003cspan class=\"badge-red\"\u003e+81% Stroke Increase 🔥\u003c\/span\u003e \u003cspan class=\"badge-blue\"\u003e💳 Afterpay • Humm • Klarna • Zip\u003c\/span\u003e \u003cspan class=\"badge-black\"\u003e🚚 Free Express Shipping AU\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eSerious pump capacity for serious 4JJ1 builds.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eFuseTech 4JJ1 HP3 Stroker Shaft\u003c\/strong\u003e dramatically increases the effective stroke of the Denso HP3 pump, taking it from approximately \u003cstrong\u003e5.8mm to 10.5mm\u003c\/strong\u003e. That equates to a \u003cstrong\u003e+4.7mm gain\u003c\/strong\u003e — an \u003cstrong\u003eapproximate 81% increase in effective stroke\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp style=\"background: #ffebee; padding: 12px; border-radius: 4px; margin: 16px 0; border-left: 4px solid #c62828;\"\u003e\u003cstrong style=\"color: #c62828;\"\u003e⚠️ HIGH-OUTPUT UPGRADE:\u003c\/strong\u003e This is not a mild stroker. Professional installation \u0026amp; ECU tuning mandatory. Rail blank recommended for sustained high rail pressure.\u003c\/p\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e📈 What the Numbers Mean\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eStock 4JJ1 HP3 effective stroke: \u003cstrong\u003e~5.8mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eStroker effective stroke: \u003cstrong\u003e~10.5mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eNet increase: \u003cstrong\u003e+4.7mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEffective stroke increase: \u003cstrong\u003e~81%\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFuel delivery in an HP3 pump is directly related to plunger stroke. An ~81% increase in effective stroke translates to a massive increase in theoretical pump output, making this shaft suitable for high-power applications where the factory pump becomes a limitation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e✅ Key Features\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e🧰 \u003cstrong\u003eCNC Machined Precision:\u003c\/strong\u003e High-accuracy stroker profile for consistent pump output\u003c\/li\u003e\n\u003cli\u003e⚙️ \u003cstrong\u003eMassive Fuel Volume Increase:\u003c\/strong\u003e ~81% effective stroke increase over stock\u003c\/li\u003e\n\u003cli\u003e🔥 \u003cstrong\u003eHigh Power Capability:\u003c\/strong\u003e Supports aggressive injector and turbo combinations\u003c\/li\u003e\n\u003cli\u003e🛡️ \u003cstrong\u003eBuilt for Load:\u003c\/strong\u003e Manufactured from high-strength materials for sustained rail pressure\u003c\/li\u003e\n\u003cli\u003e💰 \u003cstrong\u003eCost-Effective Alternative:\u003c\/strong\u003e Big pump output without moving to an entirely different pump platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e🔧 Vehicle Compatibility\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eHolden Colorado RC – 4JJ1\u003c\/li\u003e\n\u003cli\u003eIsuzu D-MAX – 4JJ1\u003c\/li\u003e\n\u003cli\u003eIsuzu MU-X – 4JJ1 (up to 2016)\u003c\/li\u003e\n\u003cli\u003eAny 4JJ1 application running a \u003cstrong\u003eDenso HP3\u003c\/strong\u003e pump\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e📦 What's Included\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e1 × FuseTech +4.7mm HP3 Stroker Shaft (CNC-machined)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: .95em; color: #555; margin-top: 8px;\"\u003e\u003cem\u003eInstallation instructions not included — professional fitting required.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e🛠️ Installation \u0026amp; Requirements\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional installation strongly recommended\u003c\/strong\u003e — HP3 requires precise assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECU tuning required\u003c\/strong\u003e to safely control rail pressure and EGTs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRail blank recommended\u003c\/strong\u003e for sustained high rail pressure (\u003ca href=\"https:\/\/www.commonrailcowboys.com\/products\/rail-blank-4jj1-yd25-4d56-1vd-4m41-mcr\" target=\"_blank\"\u003eavailable here\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eSuitable injectors and turbo system required for high-output builds\u003c\/li\u003e\n\u003cli\u003eContact us to confirm stock availability if timing is critical\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e💳 Payment \u0026amp; Shipping Options\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e💸 \u003cstrong\u003eBuy Now, Pay Later:\u003c\/strong\u003e Afterpay, Humm, Klarna \u0026amp; Zip available\u003c\/li\u003e\n\u003cli\u003e✈️ \u003cstrong\u003eFree Express Shipping Australia-Wide\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e📦 Diesel performance specialists — not general parts resellers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e⚠️ Legal Notice\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cp style=\"background: #fff3cd; padding: 10px; border-radius: 4px;\"\u003e\u003cstrong\u003eFor off-road \/ competition use only.\u003c\/strong\u003e Fuel system modifications may affect compliance. Check local regulations before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails\u003e\n\u003csummary\u003e❓ Frequently Asked Questions\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need tuning after installing this stroker shaft?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. Due to the large increase in pump output, ECU recalibration is mandatory to safely manage rail pressure, injection quantity, and EGTs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How much power can this support?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: With suitable injectors, turbo system, intercooling and tuning, this shaft supports very high-output 4JJ1 builds. Actual power capability depends on the rest of the fuel and air system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a drop-in upgrade?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It is designed for Denso HP3 pumps used on 4JJ1 engines. Due to the aggressive stroke increase, professional assembly and inspection are recommended.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a new component?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. Each FuseTech stroker shaft is brand new, CNC-machined, and manufactured specifically for performance use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is a rail blank recommended?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The massive increase in pump output can sustain very high rail pressures. A rail blank eliminates the factory pressure relief valve, allowing you to run higher sustained rail pressure without bleeding off fuel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between this and the 1KD HP3 stroker?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The 1KD HP3 stroker is 1.3mm, designed for 1KD-FTV engines. This 4JJ1 version is +4.7mm (~81% increase), specifically for 4JJ1 HP3 pumps. Much more aggressive stroke increase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003c!-- GREEN BANNER CTA - FuseTech Theme --\u003e\n\u003cdiv style=\"background: linear-gradient(135deg, #00c853 0%, #00c853 100%); color: #ffffff; padding: 20px; text-align: center; margin: 20px 0; border-radius: 6px; box-shadow: 0 0 25px rgba(0, 200, 83, 0.6), 0 0 40px rgba(0, 200, 83, 0.4), 0 0 60px rgba(0, 200, 83, 0.2);\"\u003e\n\u003ch2 style=\"margin: 0 0 10px; font-size: 20px; color: #fff; text-shadow: 0 0 10px rgba(0,0,0,0.3);\"\u003e\u003cstrong\u003e⚡ PUSH THE LIMITS OF YOUR 4JJ1\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"margin: 0; font-size: 15px; color: #fff; text-shadow: 0 0 5px rgba(0,0,0,0.3);\"\u003e\u003cem\u003eFuseTech +4.7mm HP3 stroker shaft. 81% stroke increase. High-output builds. Professional install \u0026amp; tuning mandatory.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12px; opacity: .8; margin-top: 16px;\"\u003e\u003cstrong\u003eDisclaimer:\u003c\/strong\u003e Common Rail Cowboys is not affiliated with Isuzu Motors, Holden, or Denso Corporation. Installation should be performed by a qualified HP3 pump specialist. Fitment verification and proper tuning are the buyer's responsibility.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"FuseTech","offers":[{"title":"Default Title","offer_id":44150011002934,"sku":"4JJ1-HP3-SHAFT-4.7MM","price":1022.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/7868\/6518\/files\/PhotoRoom-20231231-221146-wm-558564.700000003_watermarked.jpg?v=1704405864","url":"https:\/\/www.commonrailcowboys.com\/en-nz\/products\/4jj1-stroker-shaft-4-7mm-fusetech","provider":"Common Rail Cowboys","version":"1.0","type":"link"}