{"product_id":"spdz1-k-series-header-downpipe-12-15-civic-si-13-15-acura-ilx-stainless-bellmouth","title":"SPDZ1 K Series Header Downpipe 12-15 Civic Si \u0026 13-15 Acura ILX Stainless Bellmouth","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003eSPDZ1 K Series Header Downpipe – 2012–2015 Honda Civic Si \/ 2013–2015 Acura ILX K24 (9th Gen)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnleash the full potential of your K24 with the \u003cstrong\u003eSPDZ1 K Series Header Downpipe\u003c\/strong\u003e, engineered for maximum flow, durability, and performance. Designed for \u003cstrong\u003e9th Gen Civic Si and Acura ILX models\u003c\/strong\u003e, this header downpipe eliminates factory restrictions to deliver \u003cstrong\u003eserious horsepower and torque gains\u003c\/strong\u003e, faster turbo response, and a more aggressive exhaust note.\u003c\/p\u003e\n\u003cp\u003eCrafted from \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e with \u003cstrong\u003emandrel-bent tubing\u003c\/strong\u003e and \u003cstrong\u003eCNC-machined flanges\u003c\/strong\u003e, the SPDZ1 downpipe guarantees strength, precision, and long-lasting reliability. The \u003cstrong\u003eOEM-style 4” cast bellmouth with a 3” outlet\u003c\/strong\u003e ensures optimal exhaust velocity, while the \u003cstrong\u003eintegrated flex pipe\u003c\/strong\u003e reduces stress under high-performance driving.\u003c\/p\u003e\n\u003cp\u003eInstallation is a breeze with its \u003cstrong\u003edirect bolt-on design\u003c\/strong\u003e, fitting seamlessly to the factory cat-back exhaust or aftermarket systems—no modifications required. Equipped with \u003cstrong\u003eO2 and wideband sensor ports\u003c\/strong\u003e, plus a \u003cstrong\u003e90° O2 spacer\u003c\/strong\u003e and included gaskets\/hardware, this kit is ready for hassle-free installation.\u003c\/p\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cp\u003e✅ \u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2012–2015 Honda Civic Si (2-door \u0026amp; 4-door, 9th Gen)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2013–2015 Acura ILX K24 (9th Gen)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e✅ \u003cstrong\u003ePerformance:\u003c\/strong\u003e Increased horsepower, torque, and improved throttle response\u003cbr\u003e✅ \u003cstrong\u003eConstruction:\u003c\/strong\u003e 304 stainless steel, TIG welded, mandrel-bent tubing\u003cbr\u003e✅ \u003cstrong\u003eDesign:\u003c\/strong\u003e 4” cast bellmouth with 3” outlet for maximum exhaust flow\u003cbr\u003e✅ \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct bolt-on to OEM or aftermarket cat-back exhaust\u003cbr\u003e✅ \u003cstrong\u003ePrecision:\u003c\/strong\u003e CNC-machined manifold flanges for a perfect seal\u003cbr\u003e✅ \u003cstrong\u003eFlex Pipe:\u003c\/strong\u003e Reduces stress and vibration for longer system life\u003cbr\u003e✅ \u003cstrong\u003eComplete Kit:\u003c\/strong\u003e Includes gasket, hardware, O2 plugs, and 90° O2 spacer\u003cbr\u003e✅ \u003cstrong\u003eWarranty:\u003c\/strong\u003e Backed by a 1-year manufacturer warranty\u003c\/p\u003e\n\u003cp\u003eBuilt to the \u003cstrong\u003eSPDZ1 Racing Standard\u003c\/strong\u003e, this header downpipe is the ultimate upgrade for Civic Si and ILX owners looking for \u003cstrong\u003eaffordable performance, superior fitment, and race-ready reliability\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003ePREORDER — Not currently in stock. Estimated availability: late December 2026. This is an estimate, not a guaranteed arrival or delivery date; timing may change.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"margin-top: 24px; padding: 16px; border: 1px solid #e2e2e2; border-left: 4px solid #ed1c2b; background: #fafafa;\"\u003e\n\u003cp style=\"margin: 0 0 6px;\"\u003e\u003cstrong\u003eSPDZ1 Product Warranty Registration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003ePurchased an SPDZ1 product from Speedzone? \u003ca href=\"https:\/\/speedzone-web.com\/pages\/spdz1-product-warranty-registration\"\u003e\u003cstrong\u003eRegister your SPDZ1 product here\u003c\/strong\u003e\u003c\/a\u003e using the first name, last name, and order number from your purchase.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Speedzone Performance LLC","offers":[{"title":"Default Title","offer_id":48264655437876,"sku":"SZY-019-BASE","price":265.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/0441\/0420\/files\/CFC69A6F-4DAA-4A1B-9877-0DB967CB204C.png?v=1788155373","url":"https:\/\/buycarkartvogue.com\/products\/spdz1-k-series-header-downpipe-12-15-civic-si-13-15-acura-ilx-stainless-bellmouth","provider":"Carkart","version":"1.0","type":"link"}