{"product_id":"exhaust-headers-for-nissan-xterra-pathfinder-frontier-2005-2008-with-4-0l-engine","title":"Exhaust Headers for Nissan XTerra Pathfinder Frontier (2005-2008) 4.0L Engine","description":"\u003ch2\u003ePerformance Exhaust Headers for 2005-2008 Nissan Frontier, Pathfinder, Xterra (VQ40DE \/ D40, R51, N50)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Replaces the restrictive, crack-prone factory cast iron manifolds with high-flow stainless steel headers to optimize exhaust scavenging and reduce backpressure.\u003c\/p\u003e\n\u003ch3\u003eThe Stock Frontier, Pathfinder, Xterra Exhaust Restriction\u003c\/h3\u003e\n\u003cp\u003eThe OEM cast iron manifolds on the 4.0L VQ40DE engine are a documented failure point. Due to the density of the cast material and the tight, non-aerodynamic internal geometry, these manifolds suffer from significant heat soak and uneven thermal expansion. This frequently leads to hairline fractures and warped mounting surfaces, resulting in exhaust leaks that trigger lean codes and degrade fuel economy. Mechanically, the factory units prioritize space-saving over airflow, creating turbulent bottleneck points that trap heat near the cylinder heads and restrict the engine's ability to breathe during high-load scenarios like towing or steep climbs.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis header set is engineered from high-grade stainless steel using 1-5\/8\" primary runners to maximize exhaust gas velocity. Mandrel-bent tubing ensures consistent internal diameters throughout every curve, eliminating the flow-disrupting turbulence found in the factory casting. By facilitating superior scavenging—where the velocity of exiting exhaust pulses helps pull remaining gases from the combustion chamber—these headers improve volumetric efficiency. The 2-3\/8\" outlet collectors provide a direct, high-flow path to the rest of the exhaust system. Included metallic gaskets and hardware provide a more durable seal than standard composite gaskets, designed specifically to withstand the high EGTs associated with the Nissan V6 platform.\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;\"\u003e2005-2008 Nissan Frontier, Pathfinder, Xterra\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;\"\u003eVQ40DE \/ D40, R51, N50\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;\"\u003e261 hp \/ 281 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eInlet \/ Outlet Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1-5\/8\" \/ 2-3\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePolished Stainless Steel\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\u003e2005-2008 Nissan Pathfinder 4.0L V6\u003c\/li\u003e\n\u003cli\u003e2005-2008 Nissan Frontier 4.0L V6\u003c\/li\u003e\n\u003cli\u003e2005-2008 Nissan Xterra 4.0L V6\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e⭐\u003cb\u003e\u003ci\u003eMichael Mosby\u003c\/i\u003e\u003c\/b\u003e, left the following 5 star review for the product\u003cspan\u003e \u003c\/span\u003e\u003cb\u003eExhaust Headers for Nissan XTerra Pathfinder Frontier (2005-2008) 4.0L Engine\u003c\/b\u003e, Ordered April 2026:\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003e\u003c\/b\u003e\u003ci\u003eThanks Chip Performance. Xterra sounds and runs great. More responsive throttle makes it fun to drive. Thanks.\u003c\/i\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eThe Nissan Truck Durability\u003c\/h3\u003e\n\u003cp\u003eFor the Frontier and Xterra platforms, maintaining low-end torque is critical for utility and off-road performance. These headers provide the structural integrity required for heavy-duty cycling while clearing the path for increased horsepower. By reducing the thermal load on the cylinder heads, you effectively extend the longevity of the VQ40DE engine under rigorous work conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48003281879288,"sku":"DS-EXKTX4ZQX","price":274.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-headers-for-nissan-xterra-pathfinder-frontier-2005-2008-with-4-0l-engine-1.webp?v=1771460785","url":"https:\/\/performancechiptuning.com\/products\/exhaust-headers-for-nissan-xterra-pathfinder-frontier-2005-2008-with-4-0l-engine","provider":"Performance Chip Tuning","version":"1.0","type":"link"}