{"product_id":"hpd-4jj1-4jj3-billet-oil-cap","title":"HPD 4JJ1 \/ 4JJ3  Billet Oil Cap","description":"\u003c!-- ==================== Product: HPD Billet Oil Cap – 4JJ1 \/ 4JJ3 ==================== --\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  \/* HPD badge – MULTI-COLOR with gradient from logo colors *\/\n  .badge-crc{\n    background: linear-gradient(135deg, #76b82a 0%, #76b82a 33%, #d32f2f 33%, #d32f2f 66%, #2b5da6 66%, #2b5da6 100%);\n    color:#fff !important;\n    box-shadow: 0 0 20px rgba(118, 184, 42, 0.6), 0 0 30px rgba(211, 47, 47, 0.4);\n    font-weight: 900;\n  }\n\n  \/* Other badge colours - HPD theme *\/\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\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eHPD Billet Oil Cap – 4JJ1 \/ 4JJ3\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h1\u003e\n\u003c!-- ===== TRUST BADGES ===== --\u003e\n\u003cdiv class=\"crc-badges\"\u003e\n\u003cspan class=\"badge-crc\"\u003eHPD Special Parts\u003c\/span\u003e \u003cspan class=\"badge-red\"\u003eCNC Billet Aluminum 🎨\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\u003eUpgrade your 4JJ engine bay with the \u003cstrong\u003eHPD Billet Oil Cap\u003c\/strong\u003e — CNC-machined alloy, anodised for durability, and finished with the clean HPD Special Parts styling Thailand is known for. A fast, direct swap that looks the part and lasts.\u003c\/p\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e🧩 Overview\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cp\u003eThis billet oil cap replaces the standard plastic filler cap with a tougher, premium-grade aluminum alternative. Designed for longevity, heat resistance, and a clean look across any 4JJ build.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e🔧 Suits \/ Compatibility\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eIsuzu \u003cstrong\u003e4JJ1\u003c\/strong\u003e — all variants\u003c\/li\u003e\n\u003cli\u003eIsuzu \u003cstrong\u003e4JJ3\u003c\/strong\u003e — all variants (incl. MU-X \u0026amp; BT-50 4JJ3)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: .95em; color: #555; margin-top: 8px;\"\u003e\u003cem\u003eDirect swap using the OEM seal interface.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003e✨ Features\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined billet aluminum construction\u003c\/li\u003e\n\u003cli\u003eHeat-resistant anodised finish\u003c\/li\u003e\n\u003cli\u003ePremium Thai design by HPD Special Parts\u003c\/li\u003e\n\u003cli\u003eDirect replacement for factory filler cap\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 × HPD Billet Oil Cap\u003c\/li\u003e\n\u003cli\u003e1 × O-ring seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails\u003e\n\u003csummary\u003e🛠️ Installation Notes\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eRemove factory filler cap\u003c\/li\u003e\n\u003cli\u003eInspect seal; replace with supplied O-ring if needed\u003c\/li\u003e\n\u003cli\u003eHand-tighten only — no tools required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails\u003e\n\u003csummary\u003e⚠️ Important Notes\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eAnodised colors may vary slightly between batches\u003c\/li\u003e\n\u003cli\u003eAllow engine to cool before removing factory cap\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📦 Same-day dispatch on in-stock colors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cdetails\u003e\n\u003csummary\u003e❓ FAQs\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit both 4JJ1 and 4JJ3 engines?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes — it's a direct swap for all 4JJ1 and 4JJ3 variants, including MU-X and BT-50.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to use the supplied O-ring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Only if your factory seal is worn or damaged. Most installs reuse the OEM seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this upgrade just cosmetic?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It looks good, but it's also far more durable than the OEM plastic cap.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What colors do these come in?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Colors depend on the anodising batch — check stock options for availability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this improve engine performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No — this is a reliability and appearance upgrade, not a performance part.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003c!-- MULTI-COLOR BANNER CTA - HPD Theme --\u003e\n\u003cdiv style=\"background: linear-gradient(135deg, #76b82a 0%, #76b82a 25%, #d32f2f 25%, #d32f2f 50%, #2b5da6 50%, #2b5da6 75%, #1a3d6b 75%, #1a3d6b 100%); color: #ffffff; padding: 18px; text-align: center; margin: 20px 0; border-radius: 6px; box-shadow: 0 0 20px rgba(118, 184, 42, 0.4), 0 0 30px rgba(211, 47, 47, 0.3);\"\u003e\n\u003ch2 style=\"margin: 0 0 8px; font-size: 18px; color: #fff;\"\u003e\u003cstrong\u003e✨ Upgrade Your 4JJ Engine Bay\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"margin: 0; font-size: 14px;\"\u003e\u003cem\u003eHPD billet oil cap. CNC aluminum. Anodised finish. Hand-tighten install. Thai quality.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HPD Special Parts","offers":[{"title":"Black","offer_id":42928702095414,"sku":"4J-OIL-CAP-BLACK","price":89.67,"currency_code":"AUD","in_stock":true},{"title":"Blue","offer_id":42928702128182,"sku":"4J-OIL-CAP-BLUE","price":89.67,"currency_code":"AUD","in_stock":true},{"title":"Gold","offer_id":42928702160950,"sku":"4J-OIL-CAP-GOLD","price":89.67,"currency_code":"AUD","in_stock":true},{"title":"Purple","offer_id":42928702226486,"sku":"4J-OIL-CAP-PURPLE","price":89.67,"currency_code":"AUD","in_stock":true},{"title":"Red","offer_id":42928702259254,"sku":"4J-OIL-CAP-RED","price":89.67,"currency_code":"AUD","in_stock":true},{"title":"Pink","offer_id":43749822955574,"sku":"4J-OIL-CAP-PINK","price":89.67,"currency_code":"AUD","in_stock":true},{"title":"Silver","offer_id":43749822988342,"sku":"4J-OIL-CAP-SILVER","price":89.67,"currency_code":"AUD","in_stock":true},{"title":"Green","offer_id":43927354605622,"sku":"4JJ-OIL-CAP-GREEN","price":89.67,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/7868\/6518\/files\/rn-image_picker_lib_temp_8cce84de-97bd-4dac-80f6-28278d24a2a0.png?v=1770678362","url":"https:\/\/www.commonrailcowboys.com\/products\/hpd-4jj1-4jj3-billet-oil-cap","provider":"Common Rail Cowboys","version":"1.0","type":"link"}