{"product_id":"isr-performance-hgc-long-tube-headers-vq35de-hr-350z-g35-370z","title":"ISR Performance HGC Long Tube Headers - VQ35DE\/HR 350Z \/ G35 \/ 370Z","description":"\u003cp\u003eOur HGC Long Tube headers for the VQ35DE and VQ35HR. Built from 304 stainless steel with a stepped primary design and heavy-duty flanges, tuned to deliver low-to-mid range torque gains where these engines actually live. The HGC (High Ground Clearance) routing keeps the primaries out of the path of speed bumps and parking lot entrances, which matters more than people admit until they've scraped a header.\u003c\/p\u003e\u003ch3\u003eWhat It Does\u003c\/h3\u003e\u003cp\u003eReplaces the restrictive factory exhaust manifolds with full long tube headers. The stepped primary design helps build cylinder pressure for stronger torque in the RPM range these cars spend most of their time in. Heavy-duty flanges resist warping under repeated heat cycling, which is the failure mode that kills cheaper headers. Two O2 sensor bungs are positioned downstream of the collector, which keeps compatibility with both factory upstream and downstream O2 sensors.\u003c\/p\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for the VQ35DE and VQ35HR engines in the Nissan 350Z, Infiniti G35, and Nissan 370Z platforms.\u003c\/p\u003e\u003ch3\u003eImportant: O2 Harness Extension\u003c\/h3\u003e\u003cp\u003eBecause the O2 bungs are positioned downstream of the collector, the factory O2 sensor harness may need extension. Two separate O2 extension harnesses are available depending on chassis:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2002-2004 350Z \/ 2003-2005 G35\u003c\/strong\u003e with heated O2 sensors (blue\/green connectors): use the ISR O2 extension harness for 02-04 VQ35DE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2011+ 370Z and G37:\u003c\/strong\u003e use the ISR O2 extension harness for VQ37\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eVerify which extension harness matches your specific chassis and sensor connector style before ordering.\u003c\/p\u003e\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2x 304 stainless steel long tube headers\u003c\/li\u003e\n\u003cli\u003e2x 2-bolt exhaust gaskets\u003c\/li\u003e\n\u003cli\u003e2x Head-to-manifold gaskets\u003c\/li\u003e\n\u003cli\u003e4x O2 sensor bung plugs\u003c\/li\u003e\n\u003cli\u003e4x Exhaust nuts\u003c\/li\u003e\n\u003cli\u003e4x Exhaust bolts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e ISR Performance\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e IS-SSHD-VQ35\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eType:\u003c\/strong\u003e HGC Long Tube Headers (pair)\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eVehicle Fitment:\u003c\/strong\u003e Nissan 350Z, Infiniti G35, Nissan 370Z (VQ35DE \/ VQ35HR engines)\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 stainless steel\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eDesign:\u003c\/strong\u003e Stepped primary, long tube, heavy-duty flanges\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eGround Clearance:\u003c\/strong\u003e HGC (High Ground Clearance) routing\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eO2 Sensor Bungs:\u003c\/strong\u003e 2x downstream of the collector (compatible with factory upstream + downstream O2 sensors via extension harness)\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eSold:\u003c\/strong\u003e As a complete pair with gaskets and hardware\u003c\/p\u003e\u003cp style=\"margin-bottom: 4px;\"\u003e\u003cstrong\u003eRelated:\u003c\/strong\u003e IS-SSHD-VQ35SRT shorty header alternative for factory VQ35DE applications; ISR O2 harness extensions sold separately for the specific chassis\u003c\/p\u003e\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":45957120295109,"sku":"IS-SSHD-VQ35","price":907.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/2718\/9701\/files\/Long_Tube_Headers__90655.1742332338.500.659.jpg?v=1773346744","url":"https:\/\/www.isrcompetition.com\/products\/isr-performance-hgc-long-tube-headers-vq35de-hr-350z-g35-370z","provider":"ISR Competition","version":"1.0","type":"link"}