{"product_id":"headers-manifold-for-honda-accord-2003-2007-2-4l","title":"Headers Manifold for Honda Accord (2003-2007) 2.4L","description":"\u003ch2\u003eHigh-Flow Stainless Exhaust Manifold Header for 2003-2007 Honda Accord\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eReplaces the restrictive factory cast iron exhaust manifold to increase exhaust gas scavenging and reduce backpressure for improved engine efficiency.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Stock Accord Exhaust Restriction\u003c\/h3\u003e\n\u003cp\u003eThe factory 2003-2007 Honda Accord 2.4L utilizes a restrictive cast iron exhaust manifold designed primarily for mass production cost-efficiency rather than optimal exhaust flow. This original equipment manufacturer (OEM) manifold creates significant exhaust turbulence and backpressure due to its abrupt, unequal-length runners. This bottleneck leads to heat soak within the engine bay, choking the \u003cstrong\u003eK24 \u003c\/strong\u003eengine's upper RPM power delivery and limiting volumetric efficiency. Over time, the heavy cast iron material is also prone to heat cycling degradation, resulting in hairline cracks and exhaust leaks that negatively impact both performance and oxygen sensor fuel trim readings.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 4-2-1 performance exhaust header directly resolves these factory flow limitations. Constructed from premium, corrosion-resistant T304 stainless steel, the manifold features precision CNC-machined flanges that are heavily TIG-welded to prevent warping under extreme thermal loads. The strategic 4-2-1 tubular design merges cylinders in stages, maintaining exhaust gas velocity while significantly reducing reversion. Utilizing 1-5\/8\" OD primary inlets transitioning smoothly into a 2-1\/4\" OD outlet, this header optimizes the scavenging effect. This streamlined airflow dynamic allows the K24 engine to exhale properly, yielding an instant gain of 10-15 horsepower and torque improvements throughout the powerband.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2003-2007 Honda Accord\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eK24A4, K24A8 \/ CM5, CM7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e160-166 hp \/ 160-161 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2003 Honda Accord 2.4L 4-Cylinder\u003c\/li\u003e\n\u003cli\u003e2004 Honda Accord 2.4L 4-Cylinder\u003c\/li\u003e\n\u003cli\u003e2005 Honda Accord 2.4L 4-Cylinder\u003c\/li\u003e\n\u003cli\u003e2006 Honda Accord 2.4L 4-Cylinder\u003c\/li\u003e\n\u003cli\u003e2007 Honda Accord 2.4L 4-Cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Honda Performance Standard\u003c\/h3\u003e\n\u003cp\u003eBy upgrading the exhaust flow on your K-Series engine, you unlock the true breathing capacity of Honda's architecture, delivering sharper throttle response and an aggressive, unrestricted exhaust note.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48327380369656,"sku":"DS-EQKRSRTGR","price":219.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/headers-manifold-for-honda-accord-2003-2007-2-4l-1.webp?v=1777992982","url":"https:\/\/performancechiptuning.com\/products\/headers-manifold-for-honda-accord-2003-2007-2-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}