{"product_id":"exhaust-header-for-nissan-300zx-1984-1989-3-0l","title":"Exhaust Header for Nissan 300ZX (1984-1989) 3.0L","description":"\u003ch2\u003eHigh-Flow Performance Exhaust Header for 1984-1989 Nissan 300ZX\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The high-flow exhaust header replaces the restrictive cast-iron factory manifolds on the 1984-1989 Nissan 300ZX to optimize exhaust gas scavenging, decrease backpressure, and improve naturally aspirated cylinder evacuation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Nissan 300ZX Cast Manifold Cracking and Flow Bottlenecks\u003c\/h3\u003e\n\u003cp\u003eThe OEM exhaust manifolds on the \u003cstrong\u003eZ31\u003c\/strong\u003e chassis 300ZX rely on thick, uneven cast-iron architecture prone to heat cycling fatigue, warping, and hairline stress fractures over decades of thermal expansion. Internally, the factory log-style runners produce erratic turbulence and excessive exhaust backpressure as opposing exhaust pulses collide before reaching the downpipe. This restriction traps residual exhaust gas within the combustion chambers of the naturally aspirated \u003cstrong\u003eVG30E\u003c\/strong\u003e 3.0L V6, impeding volumetric efficiency, dulling throttle response, and radiating extreme underhood radiant heat.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eConstructed from durable stainless steel, this performance manifold kit replaces restrictive cast iron with smooth, mandrel-bent primary tubing designed to streamline exhaust gas velocity. The tuned runner geometry reduces reversion and accelerates pulse evacuation via optimized collector merges, yielding broader mid-range torque and crisper high-RPM responsiveness. Heavy-duty, CNC-machined mounting flanges resist warping under intense thermal loads, ensuring a reliable seal with the included high-temperature gaskets. Precision TIG and MIG welds throughout the assembly maintain structural integrity against chassis vibration and heat fatigue.\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;\"\u003e1984-1989 Nissan 300ZX\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\u003eVG30E\u003c\/strong\u003e \/ \u003cstrong\u003eZ31\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;\"\u003e160 hp \/ 174 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;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1984-1989 Nissan 300ZX Z31 3.0L SOHC Non-Turbo (VG30E)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the Z31 300ZX?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1984-1989 Nissan 300ZX equipped with the \u003cstrong\u003eVG30E\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this header fit VG30ET Turbocharged models?\u003c\/strong\u003e\u003cbr\u003e No, this assembly is engineered specifically for naturally aspirated \u003cstrong\u003eVG30E\u003c\/strong\u003e applications and will not mate to factory turbocharger crossover pipes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Nissan Z-Car Performance Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt to extract authentic Japanese sports car performance and acoustic tone, this stainless steel header kit enhances volumetric efficiency while resisting the severe thermal cycles typical of spirited high-RPM driving.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50512355950840,"sku":"DS-E1DA1288D","price":271.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/exhaust-header-for-nissan-300zx-1984-1989-3-0l-1.jpg?v=1789426152","url":"https:\/\/performancechiptuning.com\/es\/products\/exhaust-header-for-nissan-300zx-1984-1989-3-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}