{"product_id":"isr-performance-shorty-headers-nissan-vq35hr-vq37vhr-350z-370z","title":"ISR Performance Shorty Headers - Nissan VQ35HR VQ37VHR 350z 370z","description":"\u003cp\u003eThe ISR Performance Shorty Headers for the VQ35HR and VQ37VHR are 304 brushed stainless headers with 1-3\/4\" primary tubes, built specifically for the HR-platform 350Z and the entire 370Z run. Designed to retain mid-range torque while improving top-end power, with factory O2 bung locations preserved and clearance designed around the USDM-specific driver-side coolant\/oil cooler tube found on later VQ37 engines.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eShorty headers replace the factory exhaust manifolds with shorter, larger-diameter primary tubes that flow better than the OEM cast manifold without going all the way to long-tube headers. Result: improved exhaust flow through the entire RPM range with much less of the mid-range loss long-tubes can introduce on the VQ. The 1-3\/4\" primaries are sized for the HR\/VHR power band, and the heavy-duty flanges hold up to heat cycling. Factory O2 sensor locations are retained, so no extension harnesses or relocation work needed for emissions-side wiring.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eDesigned for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNissan 350Z (Z33) with VQ35HR engine\u003c\/strong\u003e (the late 350Z HR refresh, 2007-2008)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNissan 370Z (Z34) with VQ37VHR engine\u003c\/strong\u003e (entire 370Z production run)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWill NOT fit the earlier VQ35DE 350Z (2003-2006)\u003c\/strong\u003e. for those, see IS-SSHD-VQ35SRT (separate variant for factory VQ35DE engines, also confirmed NOT for use with LS swaps). Will not fit Infiniti G35 with VQ35DE; verify your engine code before ordering. Clearance is built in for the USDM driver-side coolant tube \/ oil cooler line on later VQ37 engines, so no chassis modification needed.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2x stainless steel shorty headers\u003c\/li\u003e\n\u003cli\u003e2x 3-bolt exhaust gaskets\u003c\/li\u003e\n\u003cli\u003e2x head-to-manifold gaskets\u003c\/li\u003e\n\u003cli\u003e6x exhaust nuts\u003c\/li\u003e\n\u003cli\u003e6x exhaust bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e ISR Performance\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e IS-SSHD-VQ37SRT\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Shorty exhaust headers\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e Nissan VQ35HR, VQ37VHR\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eVehicle Fitment:\u003c\/strong\u003e 2007-2008 350Z (Z33 HR), 2009-2021 370Z (Z34)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eExcluded:\u003c\/strong\u003e VQ35DE 350Z (use IS-SSHD-VQ35SRT instead)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 brushed stainless steel\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003ePrimary Tube Diameter:\u003c\/strong\u003e 1-3\/4\"\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eFlange Construction:\u003c\/strong\u003e Heavy duty\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eO2 Sensor:\u003c\/strong\u003e Retains factory locations\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eLate VQ37 Clearance:\u003c\/strong\u003e Built around USDM driver-side coolant\/oil cooler tube\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eCompanion Wiring:\u003c\/strong\u003e IS-VQ37O2-EXT1 (O2 harness extensions, if relocating sensors)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eSold:\u003c\/strong\u003e Pair (with all gaskets and hardware)\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eLegality:\u003c\/strong\u003e Off-road and competition use only\u003c\/p\u003e","brand":"ISR Performance","offers":[{"title":"Default Title","offer_id":45957111251141,"sku":"IS-SSHD-VQ37SRT","price":660.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/2718\/9701\/files\/P1220786__81622.1639155317__74360.1648070660.500.659.jpg?v=1773346491","url":"https:\/\/www.isrcompetition.com\/products\/isr-performance-shorty-headers-nissan-vq35hr-vq37vhr-350z-370z","provider":"ISR Competition","version":"1.0","type":"link"}