{"product_id":"4-2-1-brushed-stainless-steel-race-header-part-ahs6515b-for-the-2002-2005-civic-si-and-the-2002-2006-acura-rsx-base-model","title":"4-2-1 Race Header Civic Si RSX Part # AHS6515B for the 2002 - 2005 Civic Si and the 2002 - 2006 Acura RSX (base model)","description":"\u003ch2\u003e4-2-1 Race Header Civic Si RSX\u003c\/h2\u003e\u003cp\u003e4-2-1 Brushed Stainless Steel Race Header Part # AHS6515B for 2002-2005 Honda Civic Si \u0026amp; 2002-2006 Acura RSX Base Model\n\nImprove engine performance with the 4-2-1 Race Header Civic Si RSX, designed to deliver better exhaust flow, increased horsepower, and stronger mid-range torque. Built for enthusiasts and performance drivers, this brushed stainless steel race header is a direct fit for the 2002-2005 Honda Civic Si and 2002-2006 Acura RSX Base Model.\n\nThe advanced 4-2-1 header design helps reduce exhaust backpressure while improving scavenging efficiency, resulting in smoother power delivery and enhanced throttle response. Constructed from high-quality brushed stainless steel, this header provides long-lasting durability, corrosion resistance, and a clean motorsport-inspired finish.\n\nPerfect for street builds, track cars, or engine upgrades, the 4-2-1 Race Header Civic Si RSX is an excellent replacement for restrictive factory exhaust manifolds.\n\n\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFits 2002-2005 Honda Civic Si Fits 2002-2006 Acura RSX Base Model Performance 4-2-1 race header design Improves horsepower and torque output Better throttle response and exhaust efficiency Brushed stainless steel construction Corrosion resistant and durable finish Ideal for street and racing applications  \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e AHS6515B  \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy Choose This Header?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 4-2-1 Race Header Civic Si RSX is a smart upgrade for drivers seeking improved engine breathing, stronger acceleration, and reliable long-term performance.\u003c\/p\u003e","brand":"Speedzone Performance LLC","offers":[{"title":"Default Title","offer_id":43140978344014,"sku":"AHS6515B","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0700\/9822\/3182\/files\/AHS6515B_1_100x_85ef66b3-f54f-48ed-ac44-094a520f5354.jpg?v=1763055841","url":"https:\/\/papispartsllc.com\/products\/4-2-1-brushed-stainless-steel-race-header-part-ahs6515b-for-the-2002-2005-civic-si-and-the-2002-2006-acura-rsx-base-model","provider":"Papi’s Parts LLC","version":"1.0","type":"link"}