{"product_id":"exhaust-header-for-scion-xa-xb-2004-2006","title":"Exhaust Header for Scion xA xB (2004-2006)","description":"\u003ch2\u003eHigh-Flow Stainless Exhaust Header for 2004-2006 Scion xA, xB\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Exhaust Header replaces the restrictive factory cast manifold on 2004-2006 Scion xA and xB models to reduce exhaust backpressure, optimize pulse scavenging, and accelerate exhaust gas velocity.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Scion xA, xB Manifold Restriction\u003c\/h3\u003e\n\u003cp\u003eThe OEM cast iron exhaust manifold on the 1.5L \u003cstrong\u003e1NZ-FE\u003c\/strong\u003e platform is engineered for low-cost production rather than gas flow efficiency. Its short, unequal-length runners feature rough internal casting flash and abrupt merge angles that create high backpressure against the exhaust valves. This restriction impedes complete cylinder evacuation during overlap, causing localized thermal soak near the cylinder head and choking upper-RPM efficiency on both the \u003cstrong\u003eXP30\u003c\/strong\u003e and \u003cstrong\u003eXP60\u003c\/strong\u003e chassis.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement performance manifold utilizes mandrel-bent stainless steel primary runners designed to maintain constant cross-sectional area throughout every bend. Precision-welded joints and thick, warp-resistant mounting flanges ensure a leak-free seal against the cylinder head under extreme heat cycling. By pairing smooth internal transitions with a low-turbulence collector, this header improves scavenging dynamics, reduces thermal retention in the engine bay, and includes pre-located O2 sensor bungs for straightforward installation.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2004-2006 Scion xA, xB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e1NZ-FE\u003c\/strong\u003e \/ \u003cstrong\u003eXP30, XP60\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e108 hp \/ 105 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eSPT-EHD1470\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004-2006 Scion xA 1.5L Hatchback (NCP61)\u003c\/li\u003e\n  \u003cli\u003e2004-2006 Scion xB 1.5L Wagon (NCP31)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the XP30 and XP60 xA, xB?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct bolt-on fit for all 2004-2006 Scion xA and xB applications running the transverse \u003cstrong\u003e1NZ-FE\u003c\/strong\u003e 1.5L engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to weld or modify the stock exhaust piping during installation?\u003c\/strong\u003e\u003cbr\u003e No cutting or welding is required; this header matches standard downpipe flange locations and retains factory O2 sensor bung thread pitch.\u003c\/p\u003e\n\n\u003ch3\u003eThe Scion Tuner Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the high-revving demands of lightweight compact platforms, this header provides the flow capacity and mechanical resonance essential for unlocking genuine naturally aspirated performance and a crisp, aggressive exhaust tone from your 1.5L powertrain.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50607385772280,"sku":"DS-EEHL59F2M","price":138.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-header-for-scion-xa-xb-2004-2006-1.jpg?v=1790091192","url":"https:\/\/performancechiptuning.com\/es\/products\/exhaust-header-for-scion-xa-xb-2004-2006","provider":"Performance Chip Tuning","version":"1.0","type":"link"}