{"product_id":"throttle-body-spacer-for-infiniti-qx4-2001-2003-3-5l","title":"Throttle Body Spacer for Infiniti QX4 (2001-2003) 3.5L","description":"\u003ch2\u003eBillet Throttle Body Spacer for 2001-2003 Infiniti QX4\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Installs inline between the throttle body and intake manifold plenum to increase intake tract volume and optimize air charge velocity into the combustion chambers.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock QX4 Intake Manifold Volume Limitation\u003c\/h3\u003e\n\u003cp\u003eThe factory intake runner configuration on the VQ35DE engine suffers from boundary layer air turbulence and restricted plenum volume directly behind the OEM throttle blade. Under sudden tip-in throttle demand, the abrupt transition creates low-pressure stagnation zones at the inlet neck. This flow restriction impedes immediate cylinder filling at low-to-mid RPM operating ranges, muting off-idle throttle response and delaying torque delivery when moving this mid-size platform from a dead stop or ascending steep grades.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003ePrecision CNC-machined from 6061-T6 billet aluminum, this spacer lengthens the effective runner column to optimize fluid velocity before the air reaches the intake runners. The engineered bore geometry mitigates sheer turbulence across the throttle plate, improving manifold vacuum consistency and cylinder packing efficiency. Featuring an anodized surface treatment to resist under-hood thermal degradation and corrosion, this hardware install maintains factory sensor alignments and matches OE port dimensions without requiring ECU tuning.\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;\"\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;\"\u003e2001-2003 Infiniti QX4\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;\"\u003eVQ35DE \/ JR50\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;\"\u003e240 hp \/ 265 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\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2001 Infiniti QX4 Base 3.5L V6 (VQ35DE)\u003c\/li\u003e\n  \u003cli\u003e2002 Infiniti QX4 Base 3.5L V6 (VQ35DE)\u003c\/li\u003e\n  \u003cli\u003e2003 Infiniti QX4 Base 3.5L V6 (VQ35DE)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Infiniti Utility Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for the JR50 platform, this mechanical upgrade bolsters low-end torque recovery essential for highway overtaking and towing demands without triggering check engine lights or upsetting factory mass airflow sensor calibrations.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50498973303032,"sku":"DS-EHD0AID2T","price":47.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/throttle-body-spacer-for-infiniti-qx4-2001-2003-3-5l-1.jpg?v=1789275973","url":"https:\/\/performancechiptuning.com\/fr\/products\/throttle-body-spacer-for-infiniti-qx4-2001-2003-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}